SILKNET SOFTWARE INC
SC 13D, 2000-02-16
PREPACKAGED SOFTWARE
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D
                                 (RULE 13d-101)

     INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(a) AND
     AMENDMENTS THERETO FILED PURSUANT TO 13d-2(a) (AMENDMENT NO. _____)(1)


                            KANA COMMUNICATIONS, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                     Common Stock, $.001 Par Value Per Share
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                   483600 10 2
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


      John Hession, Esq.                           David A. Makarechian, Esq.
Testa, Hurwitz & Thibeault, LLP                  Brobeck, Phleger & Harrison LLP
        125 High Street                               Two Embaraedero Place
       Boston, MA 02110                                Palo Alto, CA 94303
        (617) 248-7000                                   (650) 424-0160
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)


                                February 6, 2000
- --------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


         If the filing person has previously filed a statement on Schedule 13G
to report the acquisition which is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the
following box [ ].

         NOTE: Schedules filed in paper format shall include a signed original
and five copies of the schedule, including all exhibits. See Rule 13d-7(b) for
other parties to whom copies are to be sent.


                         (Continued on following pages)

                              (Page 1 of 15 Pages)


- -----------
         (1) The remainder of this cover page shall be filled out for a
reporting person's initial filing on this form with respect to the subject class
of securities, and for any subsequent amendment containing information which
would alter disclosures provided in a prior cover page.

         The information required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).

<PAGE>   2
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CUSIP NO. 483600 10 2                 13D                     PAGE 2 OF 15 PAGES
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                                  SCHEDULE 13D

- --------------------------------------------------------------------------------
1      NAME OF REPORTING PERSON

       Silknet Software, Inc.

       I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
       02-0478949
- --------------------------------------------------------------------------------
2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                 (a) [ ]
                                                                         (b) [ ]

- --------------------------------------------------------------------------------
3      SEC USE ONLY


- --------------------------------------------------------------------------------
4      SOURCE OF FUNDS*

       OO
- --------------------------------------------------------------------------------
5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED              [ ]
       PURSUANT TO ITEMS 2(d) or 2(e)

- --------------------------------------------------------------------------------
6      CITIZENSHIP OR PLACE OF ORGANIZATION

       State of Delaware
- --------------------------------------------------------------------------------
                  7     SOLE VOTING POWER

                        3,008,744 (acquisition of such shares is conditioned
                        upon the occurrence of certain events specified in the
                        Kana Stock Option Agreement dated February 6, 2000 and
                        incorporated by reference as Exhibit 99.2 to this
                        Schedule 13D)
                        --------------------------------------------------------
                  8     SHARED VOTING POWER
   SHARES
BENEFICIALLY            15,821,454 (pursuant to the Kana Stock Voting
 OWNED BY               Agreement dated February 6, 2000 and incorporated by
   EACH                 reference as Exhibit 99.3 to this Schedule 13D)
 REPORTING              --------------------------------------------------------
PERSON WITH       9     SOLE DISPOSITIVE POWER

                        3,008,744 (acquisition of such shares is conditioned
                        upon the occurrence of certain events specified in
                        the Kana Stock Option Agreement dated February 6, 2000
                        and incorporated by reference as Exhibit 99.2 to this
                        Schedule 13D)
                        --------------------------------------------------------
                 10     SHARED DISPOSITIVE POWER

                        -0-
- --------------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        18,830,198
- --------------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN       [ ]
        SHARES*

- --------------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        62.0% of the Issuer's currently outstanding stock and 56.4% after
        giving effect to the exercise of the option described herein
- --------------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON *

        CO
- --------------------------------------------------------------------------------
                  *SEE INSTRUCTIONS BEFORE FILLING OUT!




<PAGE>   3

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CUSIP NO. 483600 10 2                 13D                     PAGE 3 OF 15 PAGES
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        Neither the filing of this statement on Schedule 13D nor any of its
contents shall be deemed to constitute an admission by Silknet Software, Inc.
that it is the beneficial owner of any of the common stock of Kana
Communications, Inc. referred to herein for purposes of Section 13(d) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), or for any
other purpose, and such beneficial ownership is expressly disclaimed.

ITEM 1. SECURITY AND ISSUER.

        This statement on Schedule 13D relates to the common stock, $.001 par
value per share, of Kana Communications, Inc. (the "Issuer Common Stock"), a
Delaware corporation (the "Issuer"). The principal executive offices of the
Issuer are located at 740 Bay Road, Redwood City, California 94063.

ITEM 2. IDENTITY AND BACKGROUND.

        (i)     The name of the person filing this statement is Silknet
Software, Inc., a Delaware corporation ("Silknet").

        (ii)    The address of the principal office and principal place of
business of Silknet is 50 Phillippe Cote Street, Manchester, NH 03101.

        (iii)   The principal business of Silknet is the development, marketing
and support of electronic customer relationship management software that enables
a company to offer marketing, sales, e-commerce and support services through a
single Web site interface, personalized for individual customers.

        (iv)    Set forth in SCHEDULE I is the (a) name, (b) residence or
business address, (c) present principal occupation or employment, and (d) name,
principal business and address of any corporation or other organization in which
such employment is conducted of each of Silknet's directors and executive
officers, and other individuals affiliated with persons who may be considered
"controlling persons" of Silknet as of the date hereof. Each such person listed
on SCHEDULE I is a citizen of the United States. Set forth in Schedule II is the
name, state of organization, principal business and principal business address
of other persons who may be considered "controlling persons" of Silknet. During
the past five years, neither Silknet nor, to Silknet's knowledge, any person
named in SCHEDULE I or SCHEDULE II to this Schedule 13D, has been convicted in a
criminal proceeding (excluding traffic violations or similar misdemeanors).

        (v)     During the past five years, neither Silknet nor, to Silknet's
knowledge, any person named in SCHEDULE I or SCHEDULE II to this Schedule 13D,
was a party to a civil proceeding of a judicial or administrative body of
competent jurisdiction as a result of which such person was or is subject to a
judgment, decree or final order enjoining future violations of, or prohibiting
or mandating activities subject to, Federal or state securities laws or finding
any violation with respect to such laws.

        (vi)    See (iv) above.

ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

        Pursuant to an Agreement and Plan of Reorganization dated as of February
6, 2000 (the "Merger Agreement") among the Issuer, Pistol Acquisition Corp., a
Delaware corporation and wholly-owned subsidiary of the Issuer ("Merger Sub"),
and Silknet, and subject to the conditions


<PAGE>   4

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CUSIP NO. 483600 10 2                 13D                     PAGE 4 OF 15 PAGES
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set forth therein (including approval by stockholders of Silknet and the Issuer
and state and Federal regulatory approvals), Merger Sub will be merged with and
into Silknet in accordance with the Merger Agreement (the "Merger"). At the
effective time of the Merger (the "Effective Time"), Silknet shall become a
wholly-owned subsidiary of the Issuer and each share of Silknet common stock,
$.01 par value per share ("Silknet Common Stock"), will be converted into the
right to receive 0.83 of a share (the "Exchange Ratio") of Issuer's common
stock, $.001 par value per share. The description of the Merger and the Merger
Agreement contained in this Schedule 13D are qualified in their entirety by
reference to the copy of the Merger Agreement included as EXHIBIT 99.1 to this
Schedule 13D and incorporated herein by reference.

        This statement on Schedule 13D relates to an option granted to Silknet
by the Issuer to purchase shares of Issuer Common Stock upon the occurrence of
certain events as described in Item 4 below and a voting agreement between
Silknet and certain affiliates of the Issuer whereby such affiliates have
agreed to vote, and have granted an irrevocable proxy to Silknet to vote, their
shares of Issuer Common Stock in favor of the issuance of Issuer Common Stock in
connection with the Merger as described in Item 4 below.

ITEM 4. PURPOSE OF TRANSACTION.

        (a)-(b) As described Item 3 above, this statement on Schedule 13D
relates to the Merger of Merger Sub with and into Silknet, in a statutory merger
pursuant to the Delaware General Corporation Law. At the Effective Time, the
separate existence of Merger Sub will cease to exist and Silknet will continue
as the surviving corporation. Holders of outstanding Silknet Common Stock will
receive, in exchange for each share of Silknet Common Stock held by them
immediately prior to the Merger, 0.83 of a share of Issuer Common Stock. In
addition, the Issuer will assume certain of Silknet's stock plans, stock option
agreements and all warrants outstanding as of the Effective Time.

        The Merger Agreement contains customary representations and warranties
on the part of Silknet, the Issuer and Merger Sub, and the consummation of the
Merger is subject to customary closing conditions, including, without
limitation, approval by the stockholders of Silknet and the Issuer. The Merger
Agreement also contains covenants regarding the activities of the parties
pending consummation of the Merger. Generally, each of the parties must conduct
its business in the ordinary course consistent with past practice. In certain
circumstances, upon a termination of the Merger Agreement, a cash termination
fee is required to be paid.

        As an inducement to Silknet to enter into the Merger Agreement, Silknet
and the Issuer entered into a Kana Stock Option Agreement, dated February 6,
2000 (the "Issuer Stock Option Agreement"). The Issuer Stock Option Agreement
grants Silknet an irrevocable option (the "Option") to purchase, under certain
conditions, up to the number of shares of Issuer Common Stock equal to nine and
nine-tenths percent (9.9%) of the shares of Issuer Common Stock issued and
outstanding at the time of exercise of the Option, in the manner set forth in
the Issuer Stock Option Agreement, at a purchase price of $258.88 per share,
subject to adjustment in the event of certain changes in the Issuer's
capitalization (the "Option Shares"). Silknet may exercise the Option, in whole
or in part, at any time and from time to time upon the occurrence of an
"Exercise Event."

        An "Exercise Event" shall mean the occurrence of any of (i) a Triggering
Event (as defined below), (ii) the public announcement of an Acquisition
Proposal (as defined below), or


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CUSIP NO. 483600 10 2                 13D                     PAGE 5 OF 15 PAGES
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(iii) the commencement of a solicitation within the meaning of Rule 14a-1(1) of
the Exchange Act by any person or entity seeking control of the Issuer's Board
of Directors in opposition to the Merger. If Silknet wishes to exercise the
Option, Silknet will deliver to the Issuer a written notice (each an "Exercise
Notice") specifying the total number of Option Shares it wishes to acquire. Each
closing of a purchase of Option Shares (a "Closing") will occur on a date and at
a time prior to the termination of the Option designated by Silknet in an
Exercise Notice delivered at least two (2) business days prior to the date of
such Closing, which Closing will be held at the principal offices of the Issuer.

        The term "Acquisition Proposal" means any offer or proposal (other than
by Silknet) for a transaction or series of related transactions involving: (A)
any purchase from the Issuer or acquisition by any person or "group" (as defined
in Section 13(d) of the Exchange Act and the rules and regulations thereunder)
of a majority of the total outstanding voting securities of the Issuer or any of
its subsidiaries or any tender offer or exchange offer that if consummated would
result in any person or group beneficially owning a majority of the total
outstanding voting securities of the Issuer or any merger, consolidation,
business combination or similar transaction involving the Issuer; (B) any sale,
lease (other than in the ordinary course of business), exchange, transfer,
license (other than in the ordinary course of business), acquisition or
disposition of a majority of the assets of the Issuer; or (C) any liquidation or
dissolution of the Issuer.

        A "Triggering Event" shall be deemed to have occurred if: (i) the Board
of Directors of the Issuer or any committee thereof shall for any reason have
withdrawn or shall have amended or modified in a manner adverse to Silknet its
recommendation in favor of the approval of the issuance of Issuer Common Stock
pursuant to the Merger Agreement; (ii) the Issuer shall have failed to include
in the Joint Proxy Statement/Prospectus relating to the Merger (to be filed with
the Securities and Exchange Commission and sent to the stockholders of the
Issuer and Silknet) the recommendation of the Board of Directors of the Issuer
in favor of the issuance of Issuer Common Stock pursuant to the Merger
Agreement; (iii) the Board of Directors of the Issuer shall have failed to
reaffirm its recommendation in favor of the issuance of Issuer Common Stock
pursuant to the Merger Agreement within ten (10) business days after Silknet
requests in writing that such recommendation be reaffirmed at any time following
the making, announcement or submission of a Kana Takeover Proposal (as such term
is defined in the Merger Agreement); or (iv) a tender or exchange offer for a
majority of the outstanding voting securities of the Issuer shall have been
commenced by a person unaffiliated with the Issuer and the Issuer shall not have
sent to its security holders pursuant to Rule 14e-2 promulgated under the
Exchange Act, within ten (10) business days after such tender or exchange offer
is first published sent or given, a statement disclosing that the Issuer
recommends rejection of such tender or exchange offer.

        In addition, at any time during which the Option is exercisable Silknet
shall have the right to sell to Issuer and Issuer shall be obligated to purchase
from Silknet (i) all or any portion of the Option, to the extent not previously
exercised (the "Option Agreement Put") and (ii) all or any portion of the Option
Shares, if any, acquired by Silknet pursuant to the Option (the "Option Shares
Put"). The price that Issuer shall be required to pay in connection with the
Option Agreement Put shall be equal to the difference between the Market/Tender
Offer Price (as such term is defined below) for shares of Issuer Common Stock as
of the date Silknet gives notice of its intent to exercise the Option Agreement
Put and the Exercise Price, multiplied by the number of shares of Issuer Common
Stock purchasable pursuant to the Option (or portion thereof with respect to
which Silknet is exercising the Option Agreement Put), but only if the
Market/Tender Offer Price is greater than the Exercise Price. The price that
Issuer shall be required to pay in connection with the Option Shares Put shall
be the Exercise Price paid by Silknet for shares of



<PAGE>   6

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CUSIP NO. 483600 10 2                 13D                     PAGE 6 OF 15 PAGES
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Issuer Common Stock acquired pursuant to the Option plus the difference between
the Market/Tender Offer Price and such Exercise Price (but only if the
Market/Tender Offer Price is greater than the Exercise Price) multiplied by the
number of shares of Issuer Common Stock so purchased (provided that Silknet then
has beneficial ownership of such shares of Issuer Common Stock). The term
"Market/Tender Offer Price" means the highest of (A) the highest price per share
offered pursuant to any Kana Takeover Proposal (as defined in the Merger
Agreement) which was made prior to such date and has not terminated or been
withdrawn as of such date and (B) the highest closing sale price of shares of
Issuer Common Stock as reported on the Nasdaq National Market during the six (6)
months ending on the trading day immediately preceding the date Silknet gives
notice of its intent to exercise the Option Agreement Put or the Option Shares
Put. Notwithstanding the foregoing, the aggregate cash amounts to be paid by the
Issuer to Silknet, and the aggregate cash amounts to be received by Silknet in
connection with the Option Agreement Put and the Option Shares Put are subject
to certain dollar limitations.

        The Option may not be exercised unless: (i) all material consents,
approvals, orders or authorizations of, or registrations, declarations or
filings with, any United States federal, state, or local administrative agency
or commission or other United States federal, state or local governmental
authority or instrumentality, if any, required in connection with the issuance
of the Option Shares pursuant to the Option have been obtained or made, as the
case may be, and (ii) no preliminary or permanent injunction or other order by
any court of competent jurisdiction in the United States prohibiting or
otherwise restraining such issuance is in effect. The Option will terminate upon
the earliest of certain events, including consummation of the Merger, as set
forth in the Issuer Stock Option Agreement.

        The foregoing summary of the Option is qualified in its entirety by
reference to the copy of the Issuer Stock Option Agreement included as EXHIBIT
99.2 to this Schedule 13D and incorporated herein by reference.

        Also as an inducement to Silknet to enter into the Merger Agreement,
certain affiliates of the Issuer (collectively, the "Stock Voting Agreement
Stockholders") have each entered into a Kana Stock Voting Agreement dated as of
February 6, 2000 (the "Stock Voting Agreement") with Silknet. Concurrently with
the execution of the Stock Voting Agreement, each of the Stock Voting Agreement
Stockholders delivered to Silknet an irrevocable proxy appointing Silknet (or
any nominee of Silknet) as its lawful attorney and proxy to vote an aggregate of
15,821,454 shares (including options to purchase Issuer Common Stock exercisable
within 60 days of the date of the Stock Voting Agreement) owned by the Stock
Voting Agreement Stockholders:

                (a)     in favor of approval of the issuance of shares of Issuer
        Common Stock pursuant to the Merger Agreement, and any proposal or
        action which would, or could reasonably be expected to, facilitate the
        Merger;

                (b)     against approval of any proposal made in opposition to
        or competition with consummation of the Merger and the Merger Agreement;

                (c)     against any merger, consolidation or other business
        combination of the Issuer with, sale of assets or stock of the Issuer
        to, or reorganization or recapitalization involving the Issuer, other
        than as contemplated by the Merger Agreement;

                (d)     against any liquidation or winding up of the Issuer; and


<PAGE>   7
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CUSIP NO. 483600 10 2                 13D                     PAGE 7 OF 15 PAGES
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                (e)     against any other proposal or action which would, or
        could reasonably be expected to, impede, frustrate, prevent, prohibit or
        discourage the Merger.

The Stock Voting Agreement terminates upon the earlier of the Effective Time or
the termination of the Merger Agreement. The name of each Stock Voting Agreement
Stockholder and the number of outstanding shares of Issuer Common Stock
beneficially owned by such person as of February 6, 2000 is set forth in
SCHEDULE III hereto, which is hereby incorporated herein by reference. Silknet
did not pay any additional consideration to any Stock Voting Agreement
Stockholder in connection with the execution and delivery of the Stock Voting
Agreement.

        The foregoing summary of the Stock Voting Agreement is qualified in its
entirety by reference to the copy of the form of the Kana Stock Voting Agreement
included as EXHIBIT 99.3 of this Schedule 13D and incorporated herein by
reference.

        (c)     Not applicable.

        (d)     The Issuer shall take such action so that, upon the Effective
Time, James C. Wood shall become a director of the Issuer. James C. Wood shall
be nominated for director of the Issuer at the next annual meeting of
stockholders of the Issuer.

        (e)     Other than as a result of the Merger described in Item 3 above,
not applicable.

        (f)     Not applicable.

        (g)     Not applicable.

        (h)-(i) In connection with the Merger, it is expected that Silknet
Common Stock will be delisted from the Nasdaq National Market System and will
become eligible for termination of registration under the Exchange Act.

        (j)     Other than as described above, Silknet currently has no plan or
proposals which relate to, or may result in, any of the matters listed in Items
4(a) - (j) of Schedule 13D.

ITEM 5. INTEREST IN SECURITIES OF THE ISSUER.

        (a)-(b) If the Option becomes exercisable, Silknet will have the
right to acquire up to 9.9% of the shares of Issuer Common Stock issued and
outstanding at the time of exercise of the Option. If such shares are acquired,
Silknet would have sole voting and dispositive power over such shares, and such
shares would constitute approximately 9.0% of the outstanding Issuer Common
Stock after giving effect to the exercise of the Option, based on the number of
shares of Issuer Common Stock issued and outstanding as of February 3, 2000.

        As described in Item 4 above, Silknet is a party to the Kana Stock
Voting Agreement pursuant to which holders of 15,821,454 shares of Issuer Common
Stock (representing approximately 52.1% of the outstanding shares of Issuer
Common Stock as of February 3, 2000) have agreed to vote their shares in favor
of approval of the issuance of Issuer Common Stock pursuant to the Merger
Agreement. Silknet holds an irrevocable proxy with respect to all of the shares
beneficially owned by the Stock Voting Agreement Stockholders. Silknet has the
power




<PAGE>   8

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CUSIP NO. 483600 10 2                 13D                     PAGE 8 OF 15 PAGES
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to vote all of such shares for the limited purposes described above in
connection with the Stock Voting Agreement. Silknet does not have the power to
dispose or to direct the disposition of any shares of Issuer Common Stock
pursuant to the Stock Voting Agreement. Silknet expressly disclaims beneficial
ownership of the Issuer Common Stock held by the Stock Voting Agreement
Stockholders and subject to the Stock Voting Agreement, and nothing herein shall
be deemed an admission by Silknet as to the beneficial ownership of such Issuer
Common Stock.

        To Silknet's knowledge, no shares of Issuer Common Stock are
beneficially owned by any of the persons named in SCHEDULE I or SCHEDULE II.

        (c)     Neither Silknet, nor, to Silknet's knowledge, any person named
in SCHEDULE I or SCHEDULE II, has effected any transaction in the Issuer Common
Stock during the past 60 days.

        (d)     Not applicable.

        (e)     Not applicable.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
        SECURITIES OF THE ISSUER

        Other than as described herein, to Silknet's knowledge, there are no
contracts, arrangements, understandings or relationships (legal or otherwise)
among the persons named in Item 2 and between such persons and any person with
respect to any securities of the Issuer, including but not limited to transfer
or voting of any of the securities, finder's fees, joint ventures, loan or
option arrangements, puts or calls, guarantees of profits, division of profits
or loss, or the giving or withholding of proxies.



<PAGE>   9
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CUSIP NO. 483600 10 2                 13D                     PAGE 9 OF 15 PAGES
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ITEM 7. MATERIAL TO BE FILED AS EXHIBITS



       Exhibit No.  Description
       -----------  -----------

          99.1      Agreement and Plan of Reorganization dated as of February 6,
                    2000, by and among Kana Communications, Inc., Pistol
                    Acquisition Corp. and Silknet Software, Inc. (filed
                    herewith).

          99.2      Kana Stock Option Agreement dated as of February 6, 2000, by
                    and between Kana Communications, Inc. and Silknet Software,
                    Inc. (filed herewith).

          99.3      Form of Kana Stock Voting Agreement, dated as of February 6,
                    2000 by and among Silknet Software, Inc. and certain
                    affiliates of Kana Communications, Inc. (filed herewith).

          99.4      Silknet Stock Option Agreement dated as of February 6,
                    2000, by and between Silknet Software, Inc. and Kana
                    Communications, Inc. (filed herewith).

          99.5      Form of Silknet Stock Voting Agreement, dated as of February
                    6, 2000 by and among Kana Communications, Inc. and certain
                    affiliates of Silknet Software, Inc. (filed herewith).

<PAGE>   10
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CUSIP NO. 483600 10 2                 13D                    PAGE 10 OF 15 PAGES
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                                    SIGNATURE

       After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


Date: February 16, 2000             SILKNET SOFTWARE, INC.


                                    By:  /s/ James C. Wood
                                        ----------------------------------------
                                         James C. Wood
                                         Title: Chairman of the Board, President
                                                and Chief Executive Officer




<PAGE>   11

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CUSIP NO. 483600 10 2                 13D                    PAGE 11 OF 15 PAGES
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                                   SCHEDULE I
                                   ----------
<TABLE>
<CAPTION>

NAME AND RESIDENCE OR                                                 NAME AND ADDRESS OF ANY
 BUSINESS ADDRESS IF                                                  CORPORATION OR OTHER
 DIFFERENT FROM THAT                PRINCIPAL OCCUPATION              ORGANIZATION IN WHICH
LISTED IN COLUMN THREE                 OR EMPLOYMENT                  EMPLOYMENT IS CONDUCTED
- ----------------------              --------------------              -----------------------
<S>                         <C>                                       <C>
EXECUTIVE OFFICERS:
- -------------------

James C. Wood               Chairman of the Board of Directors,       Silknet Software, Inc.
                            President and Chief Executive Officer     50 Phillippe Cote Street
                                                                      Manchester, NH 03101

Patrick J. Scannell, Jr.    Vice President, Chief Financial           Silknet Software, Inc.
                            Officer, Treasurer and Secretary          50 Phillippe Cote Street
                                                                      Manchester, NH 03101

Nigel K. Donovan            Vice President and Chief Operating        Silknet Software, Inc.
                            Officer                                   50 Phillippe Cote Street
                                                                      Manchester, NH 03101

OUTSIDE DIRECTORS:
- ------------------

Guy Bradley                 General Partner of CMG @Ventures          CMG @Ventures
                                                                      c/o CMG Information Services Inc.
                                                                      100 Brickstone Square, 5th Floor
                                                                      Andover, MA 01810

Joo Hock Chua               Vice President/Assistant General          Vertex Management (II) Pte Ltd.
                            Manager of Vertex Management              Three Lagoon Drive, Suite 220
                            (II) Pte Ltd.                             Redwood City, CA  94065

Stanley Fung                Managing Director of Zero Stage           Zero Stage Capital V, L.P.
                            Capital                                   c/o Zero Stage Capital
                                                                      101 Main Street, Kendall Square
                                                                      Cambridge, MA 02142

Andrew Goldfarb             Managing Principal of JAFCO America       JAFCO America Ventures Inc.
                            Ventures Inc.                             One Boston Place, Suite 3320
                                                                      Boston, MA 02108

Glen L. Urban               Professor, MIT Sloan School of            Massachusetts Institute of Technology
                            Management                                Sloan School of Management
                                                                      50 Memorial Drive
                                                                      Cambridge, MA 02142

</TABLE>

<PAGE>   12

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CUSIP NO. 483600 10 2                 13D                    PAGE 12 OF 15 PAGES
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<TABLE>
<S>                              <C>                              <C>
OTHER INDIVIDUALS AFFILIATED WITH PERSONS
 WHO MAY BE DEEMED "CONTROLLING PERSONS"
 OF SILKNET

David Wetherell, a               Chairman and Chief               CMG Information Services Inc.
managing member of               Executive Officer                100 Brickstone Square
CMG @Ventures II LLC             of CMGI and Managing             5th Floor
                                 Partner of CMG @Ventures         Andover, MA 01810

Peter Mills, a managing          Managing Partner of              CMG Information Services Inc
member of CMG @Ventures II LLC   CMG @Ventures                    100 Brickstone Square
                                                                  5th Floor
                                                                  Andover, MA 01810

Jonathan Callaghan, a            General Partner                  CMG Information Services Inc
managing member of               of CMG @Ventures                 100 Brickstone Square
CMG @Ventures II LLC                                              5th Floor
                                                                  Andover, MA 01810

Andrew J. Hajducky III, a        Chief Financial Officer          c/o CMG Information Services Inc.
managing member of               and Executive Vice President     100 Brickstone Square, 5th Floor
CMG @Ventures II LLC             of CMGI, and General             Andover, MA 01810
                                 Partner of CMG @Ventures

</TABLE>


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CUSIP NO. 483600 10 2                 13D                    PAGE 13 OF 15 PAGES
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                                   SCHEDULE II
                                   -----------

<TABLE>
<CAPTION>

NAME AND STATE OF                                                     ADDRESS OF PRINCIPAL PLACE OF
  ORGANIZATION                       PRINCIPAL BUSINESS                        BUSINESS
- -----------------                    ------------------               -----------------------------
<S>                            <C>                                    <C>

CMG @Ventures II LLC,          Venture capital investment vehicle     c/o CMG Information Services Inc.
a Delaware limited                                                    100 Brickstone Square, 5th Floor
liability company                                                     Andover, MA 01810

</TABLE>



<PAGE>   14

- ---------------------                                        -------------------
CUSIP NO. 483600 10 2                 13D                    PAGE 14 OF 15 PAGES
- ---------------------                                        -------------------


                                  SCHEDULE III
                                  ------------

<TABLE>
<CAPTION>
                                                             NUMBER OF SHARES OF
                                                             ISSUER COMMON STOCK
INDIVIDUAL                                                    BENEFICIALLY OWNED
- ----------                                                    ------------------
<S>                                                               <C>

Michael J. McCloskey                                                 933,333
Mark S. Gainey                                                     2,376,000
Joseph G. Ansanelli                                                  793,119
Tim Campbell                                                          31,498
Ian Cavanaugh                                                        200,000
Alexander E. Evans                                                   200,000
Paul R. Holland                                                      405,705
P.V. Kannan                                                          430,474
Joseph D. McCarthy                                                   156,666
William R. Phelps                                                    206,665
Toya Rico                                                             20,000
Don Whitt                                                             28,344
Michael R. Wolfe                                                     314,366
David M. Beirne                                                    4,312,127
Benchmark Capital Partners L.P.                                    3,783,347
Benchmark Founders' Fund L.P.                                        528,779
Robert W. Frick                                                       73,516
Eric A. Hahn                                                         216,949
Charles A. Holloway                                                  109,999
Draper Fisher Associates Fund IV, L.P.                             3,740,830
Draper Fisher Partners IV, LLC                                       281,567
Steven T. Jurvetson                                                4,022,347
Ariel Poler                                                          160,666
Gregory C. Gretsch                                                   829,630

</TABLE>


<PAGE>   15

- ---------------------                                        -------------------
CUSIP NO. 483600 10 2                 13D                    PAGE 15 OF 15 PAGES
- ---------------------                                        -------------------


                                  EXHIBIT INDEX


Exhibit No.     Description
- -----------     -----------


   99.1         Agreement and Plan of Reorganization dated as of February 6,
                2000, by and among Kana Communications, Inc., Pistol Acquisition
                Corp. and Silknet Software, Inc. (filed herewith).

   99.2         Kana Stock Option Agreement dated as of February 6, 2000, by and
                between Kana Communications, Inc. and Silknet Software, Inc.
                (filed herewith).

   99.3         Form of Kana Stock Voting Agreement, dated as of February 6,
                2000 by and among Silknet Software, Inc. and certain
                affiliates of Kana Communications, Inc. (filed herewith).

   99.4         Silknet Stock Option Agreement dated as of February 6,
                2000 by and between Silknet Software, Inc. and Kana
                Communications, Inc. (filed herewith).

   99.5         Form of Silknet Stock Voting Agreement, dated as of February
                6, 2000 by and among Kana Communications, Inc. and certain
                affiliates of Silknet Software, Inc. (filed herewith).



<PAGE>   1
                                                                    Exhibit 99.1

                                                                  EXECUTION COPY






                      AGREEMENT AND PLAN OF REORGANIZATION



                                   dated as of


                                FEBRUARY 6, 2000


                                  by and among


                           KANA COMMUNICATIONS, INC.,


                            PISTOL ACQUISITION CORP.


                                       and


                              SILKNET SOFTWARE INC.
<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                Page
                                                                                                                ----
<S>                                                                                                             <C>
ARTICLE I. THE MERGER.............................................................................................2

         Section 1.01      Effective Time Of The Merger...........................................................2
         Section 1.02      Closing................................................................................2
         Section 1.03      Effects Of The Merger..................................................................2
         Section 1.04      Directors And Officers.................................................................3

ARTICLE II. CONVERSION OF SECURITIES..............................................................................3

         Section 2.01      Conversion Of Capital Stock............................................................3
         Section 2.02      Exchange Of Certificates...............................................................4

ARTICLE III. REPRESENTATIONS AND WARRANTIES OF SILKNET............................................................6

         Section 3.01      Organization of Silknet................................................................7
         Section 3.02      Silknet Capital Structure..............................................................7
         Section 3.03      Authority; No Conflict; Required Filings And Consents..................................8
         Section 3.04      SEC Filings; Financial Statements......................................................9
         Section 3.05      No Undisclosed Liabilities............................................................10
         Section 3.06      Absence Of Certain Changes Or Events..................................................10
         Section 3.07      Taxes.................................................................................10
         Section 3.08      Properties............................................................................11
         Section 3.09      Intellectual Property.................................................................11
         Section 3.10      Agreements, Contracts And Commitments.................................................12
         Section 3.11      Litigation............................................................................13
         Section 3.12      Environmental Matters.................................................................13
         Section 3.13      Employee Benefit Plans................................................................14
         Section 3.14      Compliance With Laws..................................................................15
         Section 3.15      Tax Matters...........................................................................15
         Section 3.16      Labor Matters.........................................................................15
         Section 3.17      Insurance.............................................................................15
         Section 3.18      No Existing Discussions...............................................................15
         Section 3.19      Interested Party Transactions.........................................................16
         Section 3.20      Registration Statement; Joint Proxy Statement/Prospectus..............................16
         Section 3.21      Payments Resulting from Mergers.......................................................16
         Section 3.22      Opinion Of Financial Advisor..........................................................17
         Section 3.23      Section 203 of the DGCL Not Applicable; Silknet Rights Plan...........................17
         Section 3.24      Voting Requirements...................................................................17
         Section 3.25      Brokers...............................................................................17
         Section 3.26      Certain Contracts.....................................................................18
         Section 3.27      Silknet Voting Agreement..............................................................18
</TABLE>
<PAGE>   3
<TABLE>
<S>                                                                                                            <C>
ARTICLE IV. REPRESENTATIONS AND WARRANTIES OF Kana...............................................................18

         Section 4.01      Organization Of Kana And Merger Sub...................................................18
         Section 4.02      Kana Capital Structure................................................................18
         Section 4.03      Authority; No Conflict; Required Filings And Consents.................................19
         Section 4.04      SEC Filings; Financial Statements.....................................................20
         Section 4.05      No Undisclosed Liabilities............................................................21
         Section 4.06      Absence Of Certain Changes Or Events..................................................21
         Section 4.07      Taxes.................................................................................21
         Section 4.08      Agreements, Contracts And Commitments.................................................22
         Section 4.09      Litigation............................................................................22
         Section 4.10      Employee Benefit Plans................................................................22
         Section 4.11      Compliance With Laws..................................................................22
         Section 4.12      Tax Matters...........................................................................22
         Section 4.13      Registration Statement; Joint Proxy Statement/Prospectus..............................23
         Section 4.14      Opinion Of Financial Advisor..........................................................23
         Section 4.15      Voting Requirements...................................................................23
         Section 4.16      Brokers...............................................................................23
         Section 4.17      Kana Voting Agreement.................................................................24
         Section 4.18      Intellectual Property.................................................................24
         Section 4.19      Certain Contracts.....................................................................24

ARTICLE V. CONDUCT OF BUSINESS...................................................................................25

         Section 5.01      Covenants Of Silknet..................................................................25
         Section 5.02      Covenants Of Kana.....................................................................27
         Section 5.03      Cooperation...........................................................................29
         Section 5.04      Advice of Changes.....................................................................29

ARTICLE VI. ADDITIONAL AGREEMENTS................................................................................29

         Section 6.01      Proxy Statement/Prospectus; Registration Statement....................................29
         Section 6.02      No Solicitation by Silknet............................................................30
         Section 6.03      No Solicitation by Kana...............................................................32
         Section 6.04      Nasdaq................................................................................34
         Section 6.05      Access To Information.................................................................34
         Section 6.06      Stockholders Meetings.................................................................34
         Section 6.07      Legal Conditions To Merger............................................................37
         Section 6.08      Public Disclosure.....................................................................38
         Section 6.09      Tax-Free Reorganization...............................................................38
         Section 6.10      Nasdaq Quotation......................................................................38
         Section 6.11      Stock Plans and Warrants..............................................................38
         Section 6.12      Stock Option and Voting Agreements....................................................41
         Section 6.13      Board Composition.....................................................................41
         Section 6.14      Brokers Or Finders....................................................................42
         Section 6.15      Stand-Off Agreements..................................................................42
         Section 6.16      Registration Rights...................................................................42
         Section 6.17      Indemnification.......................................................................42
</TABLE>

                                       ii
<PAGE>   4
<TABLE>
<S>                                                                                                             <C>
         Section 6.18      Benefit Plans.........................................................................43
         Section 6.19      Registration Statement; Joint Proxy Statement/Prospectus..............................45

ARTICLE VII. CONDITIONS TO MERGER................................................................................46

         Section 7.01      Conditions To Each Party's Obligation To Effect The Merger............................46
         Section 7.02      Additional Conditions To Obligations Of Kana And Merger Sub...........................46
         Section 7.03      Additional Conditions To Obligations Of Silknet.......................................47
         Section 7.04      Frustration of Closing Conditions.....................................................48

ARTICLE VIII. TERMINATION AND AMENDMENT..........................................................................48

         Section 8.01      Termination...........................................................................48
         Section 8.02      Effect of Termination.................................................................50
         Section 8.03      Expenses and Termination Fees.........................................................50
         Section 8.04      Amendment.............................................................................51
         Section 8.05      Extension; Waiver.....................................................................51

ARTICLE IX. MISCELLANEOUS........................................................................................52

         Section 9.01      Nonsurvival Of Representations, Warranties And Agreements.............................52
         Section 9.02      Notices...............................................................................52
         Section 9.03      Definitions...........................................................................53
         Section 9.04      Interpretation........................................................................54
         Section 9.05      Counterparts..........................................................................55
         Section 9.06      Entire Agreement; No Third Party Beneficiaries........................................55
         Section 9.07      Governing Law.........................................................................55
         Section 9.08      Assignment............................................................................55

EXHIBITS

         EXHIBIT A         Silknet Voting Agreement
         EXHIBIT B         Kana Voting Agreement
         EXHIBIT C         Silknet Stock Option Agreement
         EXHIBIT D         Kana Stock Option Agreement
         EXHIBIT E         Stand-Off Agreement
         EXHIBIT F         Rights Agreement Amendment
</TABLE>

                                      iii
<PAGE>   5
                          TABLE OF DEFINED TERMS

<TABLE>
<CAPTION>
                                                                                  Cross-Reference
Terms                                                                             in Agreement
- -----                                                                             ------------
<S>                                                                               <C>
Agreement..............................................................           Preamble
Bankruptcy and Equity Exception........................................           Section 3.03(a)
Certificate of Merger..................................................           Section 1.01
Closing................................................................           Section 1.02
Closing Date...........................................................           Section 1.02
Confidentiality Agreement..............................................           Section 9.01
Constituent Corporations...............................................           Section 1.03
Costs..................................................................           Section 6.17(a)
Current Premium........................................................           Section 6.17(b)
DGCL...................................................................           Section 1.01
Effective Time.........................................................           Section 1.01
Environmental Law......................................................           Section 3.12(b)
ERISA..................................................................           Section 3.13(a)
ERISA Affiliate........................................................           Section 3.13(a)
Exchange Act...........................................................           Section 3.03(c)
Exchange Agent.........................................................           Section 2.02(a)
Exchange Fund..........................................................           Section 2.02(a)
Exchange Ratio.........................................................           Section 2.01(c)
Governmental Entity....................................................           Section 3.03(c)
Hazardous Substance....................................................           Section 3.12(c)
Indemnified Parties....................................................           Section 6.17(a)
Internal Revenue Code..................................................           Preamble
IRS....................................................................           Section 3.07(b)
Joint Proxy Statement/Prospectus.......................................           Section 3.20
Kana Balance Sheet.....................................................           Section 4.04(b)
Kana Common Stock......................................................           Section 2.01(b)
Kana Disclosure Schedule...............................................           Article IV
Kana Employee Plans....................................................           Section 6.18(c)
Kana Entry Date........................................................           Section 6.11(f)
Kana ESPP..............................................................           Section 6.18(b)
Kana Intellectual Property Rights......................................           Section 4.18(a)
Kana Material Adverse Effect...........................................           Section 9.03(b)
Kana Material Contracts................................................           Section 4.08
Kana Preferred Stock...................................................           Section 4.02(a)
Kana Principal Stockholders............................................           Preamble
Kana SEC Reports.......................................................           Section 4.04(a)
Kana Stock Option Agreement............................................           Preamble
Kana Stock Plans.......................................................           Section 4.02(a)
Kana Stockholders Agreement............................................           Preamble
Kana Stockholders Meeting..............................................           Section 3.20
</TABLE>

                                       iv
<PAGE>   6

<TABLE>
<CAPTION>
                                                                                 Cross-Reference
Terms                                                                             in Agreement
- -----                                                                            ---------------
<S>                                                                               <C>
Kana Superior Offer....................................................           Section 6.06(d)
Kana Takeover Proposal.................................................           Section 6.03(d)
Kana Voting Proposal...................................................           Section 6.03(a)
Material Lease(s)......................................................           Section 3.08(a)
Merger.................................................................           Preamble
Merger Consideration...................................................           Section 2.01(c)(c)
Merger Sub.............................................................           Preamble
Order..................................................................           Section 6.07(b)
Other Filings..........................................................           Section 6.01
Payment Period.........................................................           Section 3.02(c)
Registration Statement.................................................           Section 3.20
Representatives........................................................           Section 6.02(a)
Repurchase Options.....................................................           Section 6.11(a)
SEC....................................................................           Section 3.03(c)
SEC Effective Date.....................................................           Section 6.01
Securities Act.........................................................           Section 3.04(a)
Stand-Off Agreement....................................................           Section 6.15
Silknet Balance Sheet..................................................           Section 3.04(b)
Silknet Certificates...................................................           Section 2.02(b)
Silknet Common Stock...................................................           Section 2.01(b)
Silknet Disclosure Schedule............................................           Article III
Silknet Employee Plans.................................................           Section 3.13(a)
Silknet ESPP...........................................................           Section 3.02(c)
Silknet Intellectual Property Rights...................................           Section 3.09(a)
Silknet Material Adverse Effect........................................           Section 9.03(a)
Silknet Material Contracts.............................................           Section 3.10
Silknet Preferred Stock................................................           Section 3.02(a)
Silknet Principal Stockholders.........................................           Preamble
Silknet Rights Plan....................................................           Section 3.23(b)
Silknet SEC Reports....................................................           Section 3.04(a)
Silknet Stock Option...................................................           Section 6.11
Silknet Stock Option Agreement.........................................           Preamble
Silknet Stock Plans....................................................           Section 3.02(a)
Silknet Stockholder Approval...........................................           Section 3.24
Silknet Stockholders Agreement.........................................           Preamble
Silknet Stockholders Meeting...........................................           Section 3.20
Silknet Superior Offer.................................................           Section 6.06(b)
Silknet Takeover Proposal..............................................           Section 6.01(c)
Stock Option Agreements................................................           Preamble
Subsidiary.............................................................           Section 3.01
Surviving Corporation..................................................           Section 1.03
Tax....................................................................           Section 3.07(a)
Taxes..................................................................           Section 3.07(a)
Voting Agreements......................................................           Section 6.12
</TABLE>

                                       v
<PAGE>   7
                      AGREEMENT AND PLAN OF REORGANIZATION


                  AGREEMENT AND PLAN OF REORGANIZATION (the "Agreement"), dated
as of February 6, 2000, by and among Kana Communications, Inc., a Delaware
corporation ("Kana"), Pistol Acquisition Corp., a Delaware corporation and a
direct, wholly-owned subsidiary of Kana ("Merger Sub") and Silknet Software
Inc., a Delaware corporation ("Silknet").

                  WHEREAS, the Boards of Directors of Kana and Silknet deem it
advisable and in the best interests of each corporation and their respective
stockholders that Kana and Silknet combine in order to advance the long-term
business interests of Kana and Silknet;

                  WHEREAS, the respective Boards of Directors of Kana and
Silknet have each determined that the Merger and the other transactions
contemplated hereby are consistent with, and in furtherance of, their respective
business strategies and goals and that the products and services of Silknet will
compliment and enhance the products and services of Kana;

                  WHEREAS, the combination of Kana and Silknet shall be effected
by the terms of this Agreement through a merger in which the stockholders of
Silknet will become stockholders of Kana (the "Merger");

                  WHEREAS, simultaneously with the execution and delivery of
this Agreement and as a condition and inducement to the willingness of Kana and
Merger Sub to enter into this Agreement, Kana and certain principal stockholders
of Silknet (the "Silknet Principal Stockholders") are entering into an agreement
(the "Silknet Stockholders Agreement") pursuant to which the Silknet Principal
Stockholders will agree to vote to approve this Agreement and to take certain
other actions in furtherance of the Merger upon the terms and subject to the
conditions set forth in the Silknet Stockholders Agreement;

                  WHEREAS, simultaneously with the execution and delivery of
this Agreement and as a condition and inducement to the willingness of Silknet
to enter into this Agreement, Silknet and certain directors, officers and
principal stockholders of Kana (the "Kana Principal Stockholders") are entering
into an agreement (the "Kana Stockholders Agreement") pursuant to which the Kana
Principal Stockholders will agree to vote to approve the transactions
contemplated by this Agreement and to take certain other actions in furtherance
of the Merger upon the terms and subject to the conditions set forth in the Kana
Stockholders Agreement;

                  WHEREAS, immediately following execution and delivery of this
Agreement, Silknet and Kana will enter into stock option agreements whereby
Silknet will grant Kana the option to purchase shares of Silknet Common Stock
(the "Silknet Stock Option Agreement") and Kana will grant Silknet the option to
purchase shares of Kana Common Stock (the "Kana Stock Option Agreement")
(collectively, the "Stock Option Agreements");

                  WHEREAS, for federal income tax purposes, it is intended that
(a) the Merger shall qualify as a reorganization within the meaning of Section
368(a) of the Internal Revenue Code of 1986, as amended (the "Internal Revenue
Code") and the rules and regulations promulgated thereunder, (b) this Agreement
constitutes a plan of reorganization, and (c) Kana,
<PAGE>   8
Merger Sub and Silknet will each be a party to such reorganization within the
meaning of Section 368(b) of the Code;

                  WHEREAS, for accounting purposes, it is intended that the
Merger shall be accounted for as a purchase; and

                  WHEREAS, Kana, Merger Sub and Silknet desire to make certain
representations, warranties, covenants and agreements in connection with the
Merger and also to prescribe various conditions to the Merger.

                  NOW, THEREFORE, in consideration of the foregoing and the
respective representations, warranties, covenants and agreements set forth
below, the parties agree as follows:

                                   ARTICLE I.
                                   THE MERGER

     Section 1.01      Effective Time Of The Merger.

                  Subject to the provisions of this Agreement, a certificate of
merger (the "Certificate of Merger") in such form as is required by the relevant
provisions of the Delaware General Corporation Law ("DGCL") shall be duly
prepared, executed and acknowledged by the Surviving Corporation (as defined in
Section 1.03) and thereafter delivered to the Secretary of State of the State of
Delaware for filing, as provided in the DGCL, as early as practicable on the
Closing Date (as defined in Section 1.02). The Merger shall become effective
upon the filing of the Certificate of Merger with the Secretary of State of the
State of Delaware (the "Effective Time").

     Section 1.02      Closing.

                  The closing of the Merger (the "Closing") will take place at
10:00 a.m., local time, on a date to be specified by Kana and Silknet, which
shall be no later than the second business day after satisfaction of the latest
to occur of the conditions set forth in Section 7.01, Section 7.02(b) (other
than the delivery of the officers' certificate referred to therein) and Section
7.03(b) (other than the delivery of the officers' certificate referred to
therein) (provided that the other closing conditions set forth in Article VII
have been met or waived as provided in Article VII at or prior to the Closing),
(the "Closing Date"), at the offices of Brobeck, Phleger & Harrison LLP, Palo
Alto California, unless another date, place or time is agreed to in writing by
Kana and Silknet.

     Section 1.03      Effects Of The Merger.

                  At the Effective Time (i) the separate existence of Merger Sub
shall cease and Merger Sub shall be merged with and into Silknet (Merger Sub and
Silknet are sometimes referred to below as the "Constituent Corporations" and
Silknet following the Merger is sometimes referred to below as the "Surviving
Corporation"), (ii) the Certificate of Incorporation of Silknet shall be amended
so that Article Fourth of such Certificate of Incorporation reads in its

                                       2
<PAGE>   9
entirety as follows: "The total number of shares of all classes of stock which
the Corporation shall have authority to issue is 1000, all of which shall
consist of Common Stock, par value $.001 per share," and, as so amended, such
Certificate of Incorporation shall be the Certificate of Incorporation of the
Surviving Corporation, and (iii) the Bylaws of Merger Sub as in effect
immediately prior to the Effective Time shall be the Bylaws of the Surviving
Corporation.

     Section 1.04      Directors And Officers.

(a) The officers of Merger Sub immediately prior to the Effective Time shall be
the initial officers of the Surviving Corporation, each to hold office in
accordance with the Certificate of Incorporation and Bylaws of the Surviving
Corporation.

(b) Kana shall take such action so that, upon the Effective Time, James C. Wood
shall become a director of Kana. James C. Wood shall be nominated for director
of Kana at the next annual meeting of stockholders of Kana.


                                  ARTICLE II.
                            CONVERSION OF SECURITIES

     Section 2.01      Conversion Of Capital Stock.

                  As of the Effective Time, by virtue of the Merger and without
any action on the part of the holder of any shares of Silknet Common Stock or
capital stock of Merger Sub:

(a) Capital Stock Of Merger Sub. Each issued and outstanding share of the
capital stock of Merger Sub shall be converted into and become one fully paid
and nonassessable share of Common Stock, par value $.001 per share, of the
Surviving Corporation.

(b) Cancellation Of Treasury Stock And Kana-Owned Stock. All shares of Common
Stock, par value $.01 per share, of Silknet ("Silknet Common Stock") that are
owned by Silknet as treasury stock and any shares of Silknet Common Stock owned
by Kana, Merger Sub or any other wholly-owned Subsidiary (as defined in Section
3.01) of Kana shall be cancelled and retired and shall cease to exist and no
stock of Kana or other consideration shall be delivered in exchange therefor.
All shares of Common Stock, par value $.001 per share, of Kana ("Kana Common
Stock") owned by Silknet shall be unaffected by the Merger.

(c) Exchange Ratio For Silknet Common Stock. Subject to Section 2.02, each
issued and outstanding share of Silknet Common Stock (other than shares to be
cancelled in accordance with Section 2.01(b)) shall be converted into the right
to receive 0.83 of a duly authorized, validly issued, fully paid and
nonassessable share (the "Exchange Ratio") of Kana Common Stock (the "Merger
Consideration"). As of the Effective Time, all such shares of Silknet Common
Stock, when so converted, shall no longer be outstanding and shall automatically
be cancelled and retired and shall cease to exist, and each holder of a
certificate representing any such shares shall cease to have any rights with
respect thereto, except the right to receive the shares of Kana Common Stock and
any cash in lieu of fractional shares of Kana Common Stock to be issued or paid
in consideration therefor upon the surrender of such

                                       3
<PAGE>   10
certificate in accordance with Section 2.02, without interest. In the event Kana
changes (or establishes a record date for changing) the number of shares of Kana
Common Stock issued and outstanding prior to the Effective Time as a result of a
stock split, stock dividend, recapitalization, subdivision, reclassification,
combination, exchange of shares or similar transaction with respect to the
outstanding Kana Common Stock and the record date therefor shall be prior to the
Effective Time (including the two-for-one stock dividend expected to be paid by
Kana on February 22, 2000), the Exchange Ratio shall be proportionately and
equitably adjusted to reflect such stock split, stock dividend,
recapitalization, subdivision, reclassification, combination, exchange of shares
or similar transaction.

     Section 2.02      Exchange Of Certificates.

                  The procedures for exchanging outstanding shares of Silknet
Common Stock for Kana Common Stock pursuant to the Merger are as follows:

                  (a) Exchange Agent. As of the Effective Time, Kana shall
deposit with a bank or trust company designated by Kana and Silknet (the
"Exchange Agent"), for the benefit of the holders of shares of Silknet Common
Stock, for exchange in accordance with this Section 2.02, through the Exchange
Agent, certificates representing the shares of Kana Common Stock (such shares of
Kana Common Stock, together with any dividends or distributions with respect
thereto issuable by virtue of subsection (c) below, being hereinafter referred
to as the "Exchange Fund") issuable pursuant to Section 2.01 in exchange for
outstanding shares of Silknet Common Stock and any cash payable in lieu of
fractional shares of Silknet Common Stock.

                  (b) Exchange Procedures. As soon as reasonably practicable
after the Effective Time, the Exchange Agent shall mail to each holder of record
of a certificate or certificates which immediately prior to the Effective Time
represented outstanding shares of Silknet Common Stock (the "Silknet
Certificates") whose shares were converted pursuant to Section 2.01 into the
right to receive the Merger Consideration (i) a letter of transmittal (which
shall specify that delivery shall be effected, and risk of loss and title to the
Silknet Certificates shall pass, only upon delivery of the Silknet Certificates
to the Exchange Agent and shall be in such form and have such other provisions
as Kana and Silknet may reasonably specify) and (ii) instructions for effecting
the surrender of the Silknet Certificates in exchange for the Merger
Consideration (plus cash in lieu of fractional shares, if any, of Kana Common
Stock as provided below). Upon surrender of a Silknet Certificate for
cancellation to the Exchange Agent, together with such letter of transmittal,
duly executed, the holder of such Silknet Certificate shall receive in exchange
therefor a certificate representing that number of whole shares of Kana Common
Stock which such holder has the right to receive pursuant to the provisions of
this Article II, certain dividends or other distributions in accordance with
subsection (c) below, cash in lieu of any fractional share of Kana Common Stock
in accordance with subsection (e) below, and the Silknet Certificate so
surrendered shall immediately be cancelled. In the event of a transfer of
ownership of Silknet Common Stock which is not registered in the transfer
records of Silknet, a certificate representing the proper number of shares of
Kana Common Stock may be issued to a transferee if the Silknet Certificate
representing such Silknet Common Stock is presented to the Exchange Agent,
accompanied by all documents required to evidence and effect such transfer and
by evidence that any applicable stock transfer taxes have been paid. Until
surrendered as

                                       4
<PAGE>   11
contemplated by this Section 2.02, each Silknet Certificate shall be deemed at
any time after the Effective Time to represent only the right to receive upon
such surrender the Merger Consideration and cash in lieu of any fractional
shares of Kana Common Stock as contemplated by this Section 2.02.

                  (c) Distributions With Respect To Unexchanged Shares. No
dividends or other distributions declared or made after the Effective Time with
respect to Kana Common Stock with a record date after the Effective Time shall
be paid to the holder of any unsurrendered Silknet Certificate with respect to
the shares of Kana Common Stock represented thereby and no cash payment in lieu
of fractional shares shall be paid to any such holder pursuant to subsection (e)
below, and all such dividends, other distributions and cash in lieu of
fractional shares of Kana Common Stock shall be paid by Kana to the Exchange
Agent and shall be included in the Exchange Fund, in each case until the holder
of record of such Silknet Certificate shall surrender such Silknet Certificate.
Subject to the effect of applicable laws, following surrender of any such
Silknet Certificate, there shall be paid to the record holder of the
certificates representing whole shares of Kana Common Stock issued in exchange
therefor, without interest, (i) at the time of such surrender, the amount of any
cash payable in lieu of a fractional share of Kana Common Stock to which such
holder is entitled pursuant to subsection (e) below and the amount of dividends
or other distributions with a record date after the Effective Time previously
paid with respect to such whole shares of Kana Common Stock, and (ii) at the
appropriate payment date, the amount of dividends or other distributions with a
record date after the Effective Time but prior to surrender and a payment date
subsequent to surrender payable with respect to such whole shares of Kana Common
Stock.

                  (d) No Further Ownership Rights In Silknet Common Stock. All
shares of Kana Common Stock issued upon the surrender for exchange of Silknet
Certificates in accordance with the terms hereof (including any cash paid
pursuant to subsection (c) or subsection (e) of this Section 2.02) shall be
deemed to have been issued in full satisfaction of all rights pertaining to such
shares of Silknet Common Stock, subject, however, to the Surviving Corporation's
obligation to pay any dividends or make any other distributions with a record
date prior to the Effective Time which may have been declared or made by Silknet
on such shares of Silknet Common Stock in accordance with the terms of this
Agreement (to the extent permitted under Section 5.01) prior to the date hereof
and which remain unpaid at the Effective Time, and from and after the Effective
Time there shall be no further registration of transfers on the stock transfer
books of the Surviving Corporation of the shares of Silknet Common Stock which
were outstanding immediately prior to the Effective Time. If, after the
Effective Time, Silknet Certificates are presented to the Surviving Corporation
or the Exchange Agent for any reason, they shall be cancelled and exchanged as
provided in this Section 2.02.

                  (e) No Fractional Shares. No certificate or scrip representing
fractional shares of Kana Common Stock shall be issued upon the surrender for
exchange of Silknet Certificates, and such fractional share interests will not
entitle the owner thereof to vote or to any other rights of a stockholder of
Kana. Notwithstanding any other provision of this Agreement, each holder of
shares of Silknet Common Stock exchanged pursuant to the Merger who would
otherwise have been entitled to receive a fraction of a share of Kana Common
Stock (after taking into account all Silknet Certificates delivered by such
holder) shall receive, in lieu thereof, cash (without interest) in an amount
equal to such fractional part of a share of Kana Common Stock multiplied

                                       5
<PAGE>   12
by the average of the last reported sales prices of Kana Common Stock, as
reported on the Nasdaq National Market, on each of the ten (10) trading days
immediately preceding the date of the Effective Time.

                  (f) Termination Of Exchange Fund. Any portion of the Exchange
Fund which remains undistributed to the holders of Silknet Certificates for one
hundred eighty (180) days after the Effective Time shall be delivered to Kana,
upon demand, and any holders of Silknet Certificates who have not previously
complied with this Section 2.02 shall thereafter look only to Kana for payment
of their claim for Merger Consideration, any cash in lieu of fractional shares
of Kana Common Stock and any dividends or distributions with respect to Kana
Common Stock.

                  (g) No Liability. Neither Kana nor Silknet shall be liable to
any holder of shares of Silknet Common Stock or Kana Common Stock, as the case
may be, for such shares (or dividends or distributions with respect thereto)
delivered to a public official pursuant to any applicable abandoned property,
escheat or similar law.

                  (h) Withholding Rights. Each of Kana and the Surviving
Corporation shall be entitled to deduct and withhold from the consideration
otherwise payable pursuant to this Agreement to any holder of shares of Silknet
Common Stock such amounts as it is required to deduct and withhold with respect
to the making of such payment under the Internal Revenue Code, or any provision
of state, local or foreign tax law. To the extent that amounts are so withheld
by Surviving Corporation or Kana, as the case may be, such withheld amounts
shall be treated for all purposes of this Agreement as having been paid to the
holder of the shares of Silknet Common Stock in respect of which such deduction
and withholding was made by Surviving Corporation or Kana, as the case may be.

                  (i) Lost Silknet Certificates. If any Silknet Certificate
shall have been lost, stolen or destroyed, upon the making of an affidavit of
that fact by the person claiming such Silknet Certificate to be lost, stolen or
destroyed and, if required by the Surviving Corporation, the posting by such
person of a bond in such reasonable amount as the Surviving Corporation may
direct as indemnity against any claim that may be made against it with respect
to such Silknet Certificate, the Exchange Agent will issue in exchange for such
lost, stolen or destroyed Silknet Certificate the shares of Kana Common Stock
and any cash in lieu of fractional shares, and unpaid dividends and
distributions on shares of Kana Common Stock deliverable in respect thereof
pursuant to this Agreement.

                                  ARTICLE III.

                    REPRESENTATIONS AND WARRANTIES OF SILKNET

                  Silknet represents and warrants to Kana and Merger Sub that
the statements contained in this Article III are true and correct except as set
forth herein and in the disclosure schedule delivered by Silknet to Kana on or
before the date of this Agreement (the "Silknet Disclosure Schedule"). The
Silknet Disclosure Schedule shall be arranged in paragraphs corresponding to the
numbered and lettered sections contained in this Article III and the

                                       6
<PAGE>   13
disclosure in any paragraph shall qualify other sections in this Article III
only to the extent that it is reasonably apparent from a reading of such
disclosure that it also qualifies or applies to such other sections.

     Section 3.01      Organization of Silknet.

                  Each of Silknet and its Subsidiaries (as defined below) is a
corporation duly organized, validly existing and in good standing under the laws
of the jurisdiction of its incorporation, has all requisite corporate power to
own, lease and operate its property and to carry on its business as now being
conducted and as proposed to be conducted, and is duly qualified to do business
and is in good standing as a foreign corporation in each jurisdiction in which
the failure to be so qualified would have a Silknet Material Adverse Effect, as
defined in Section 9.03(a). Except as set forth in the Silknet SEC Reports (as
defined in Section 3.04) filed prior to the date hereof, neither Silknet nor any
Subsidiary of Silknet directly or indirectly owns any equity or similar interest
in, or any interest convertible into or exchangeable or exercisable for, any
corporation, partnership, joint venture or other business association or entity,
excluding securities in any publicly traded company held for investment by
Silknet and comprising less than five percent (5%) of the outstanding stock of
such company. Each and every Subsidiary of Silknet and its place of
incorporation or organization is listed in Section 3.01 of the Silknet
Disclosure Schedule. As used in this Agreement, the word "Subsidiary" or
"Subsidiaries" means, with respect to any party, any corporation or other
organization, whether incorporated or unincorporated, of which (i) such party or
any other Subsidiary of such party is a general partner (excluding partnerships,
the general partnership interests of which held by such party or any Subsidiary
of such party do not have a majority of the voting interest in such partnership)
or (ii) at least a majority of the securities or other interests having by their
terms ordinary voting power to elect a majority of the Board of Directors or
others performing similar functions with respect to such corporation or other
organization is directly or indirectly owned or controlled by such party or by
any one or more of its Subsidiaries, or by such party and one or more of its
Subsidiaries.

     Section 3.02      Silknet Capital Structure.

                  (a) The authorized capital stock of Silknet consists of
50,000,000 shares of Common Stock, $.01 par value, and 15,000,000 shares of
Preferred Stock, $.01 par value, ("Silknet Preferred Stock"). As of February 3,
2000, (i) 17,174,133 shares of Silknet Common Stock were issued and outstanding,
all of which are validly issued, fully paid and nonassessable and (ii) no shares
of Silknet Common Stock were held in the treasury of Silknet or by its
Subsidiaries. The Silknet Disclosure Schedule shows the number of shares of
Silknet Common Stock reserved for future issuance pursuant to stock options
granted and outstanding as of February 3, 2000 and the plans under which such
options were granted (collectively, the "Silknet Stock Plans"). No material
change in such capitalization has occurred between December 31, 2000 and the
date of this Agreement. As of the date of this Agreement, none of the shares of
Silknet Preferred Stock is issued and outstanding. All shares of Silknet Common
Stock subject to issuance as specified above are duly authorized and, upon
issuance on the terms and conditions specified in the instruments pursuant to
which they are issuable, shall be validly issued, fully paid and nonassessable.
There are no obligations, contingent or otherwise, of Silknet or its
Subsidiaries to repurchase, redeem or otherwise acquire any shares of Silknet
Common Stock or

                                       7
<PAGE>   14
the capital stock of any Subsidiary or to provide funds to or make any material
investment (in the form of a loan, capital contribution or otherwise) in any
Subsidiary or any other entity other than guarantees of bank obligations of its
Subsidiaries entered into in the ordinary course of business, except for
repurchase rights of Silknet under the Silknet stock option plans, or under any
stock option agreements pursuant to which options were granted under these
plans. All of the outstanding shares of capital stock of Silknet's Subsidiaries
are duly authorized, validly issued, fully paid and nonassessable and all such
shares (other than directors' qualifying shares in the case of foreign
Subsidiaries) are owned by Silknet or another Subsidiary free and clear of all
security interests, liens, claims, pledges, agreements, limitations in Silknet's
voting rights, charges or other encumbrances of any nature.

                  (b) Except as disclosed in Section 3.02 of the Silknet
Disclosure Schedule or as set forth in this Section 3.02 or as reserved for
future grants of options under the Silknet Stock Plans or the Silknet Stock
Option Agreement, there are no equity securities of any class of Silknet or its
Subsidiaries, or any security exchangeable into or exercisable for such equity
securities, issued, reserved for issuance or outstanding. There are no options,
warrants, equity securities, calls, rights, commitments or agreements of any
character to which Silknet or any Subsidiary is a party or by which it is bound
obligating Silknet or any Subsidiary to issue, deliver or sell, or cause to be
issued, delivered or sold, additional shares of capital stock of Silknet or any
Subsidiary or obligating Silknet or any Subsidiary to grant, extend, accelerate
the vesting of or enter into any such option, warrant, equity security, call,
right, commitment or agreement. There are no voting trusts, proxies or other
voting agreements or understandings with respect to the shares of capital stock
of Silknet and to which Silknet is a party. The terms of the Silknet Stock Plans
and the agreements evidencing the outstanding options thereunder will permit the
assumption of those options by Kana in the manner contemplated in Section 6.11
of this Agreement, without the approval or consent of the holders of those
options, the Silknet stockholders or other party.

                  (c) The current "Payment Period" (as defined under the Silknet
Employee Purchase Plan (the "Silknet ESPP")) began on February 1, 2000, and will
end on the date determined in accordance with Section 6.11(f) of this Agreement.
Except for the purchase rights granted under the Silknet ESPP on February 1,
2000, to the current participants in the Payment Period that commenced on that
date, there are no other purchase rights or options outstanding under the
Silknet ESPP.

     Section 3.03      Authority; No Conflict; Required Filings And Consents.

                  (a) Silknet has all requisite corporate power and authority to
enter into this Agreement and the Silknet Stock Option Agreement and to
consummate the transactions contemplated hereby and thereby. The execution and
delivery of this Agreement and the Silknet Stock Option Agreement and the
consummation of the transactions contemplated by this Agreement and the Silknet
Stock Option Agreement by Silknet have been duly authorized by all necessary
corporate action on the part of Silknet, subject only to the approval of the
Merger by Silknet stockholders under the DGCL. This Agreement and the Silknet
Stock Option Agreement have been duly executed and delivered by Silknet and
constitute the valid and binding obligations of Silknet, enforceable in
accordance with their terms, subject to bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium and similar laws of general

                                       8
<PAGE>   15
applicability relating to or affecting creditors' rights and to general
principles of equity (the "Bankruptcy and Equity Exception").

                  (b) The execution and delivery of this Agreement and the
Silknet Stock Option Agreement by Silknet does not, and the consummation of the
transactions contemplated by this Agreement and the Silknet Stock Option
Agreement will not, (i) conflict with, or result in any violation or breach of,
any provision of the Certificate of Incorporation or Bylaws of Silknet, (ii)
result in any violation or breach of, or constitute (with or without notice or
lapse of time, or both) a default (or give rise to a right of termination,
cancellation or acceleration of any obligation or loss of any material benefit)
under, or require a consent or waiver under, any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, lease, contract or other
agreement, instrument or obligation to which Silknet or its Subsidiaries is a
party or by which any of them or any of their properties or assets may be bound,
or (iii) conflict with or violate any permit, concession, franchise, license,
judgment, order, decree, statute, law, ordinance, rule or regulation applicable
to Silknet or any Subsidiary or any of its or their properties or assets, except
in the case of (ii) and (iii) for any such conflicts, violations, defaults,
terminations, cancellations or accelerations which, individually or in the
aggregate, would not have a Silknet Material Adverse Effect.

                  (c) No consent, approval, order or authorization of, or
registration, declaration or filing with, any court, administrative agency or
commission or other governmental authority or instrumentality ("Governmental
Entity") is required by or with respect to Silknet or any of its Subsidiaries in
connection with the execution and delivery of this Agreement and the Silknet
Stock Option Agreement or the consummation of the transactions contemplated
hereby, except for (i) the filing of the Certificate of Merger with the Delaware
Secretary of State, (ii) the filing of the Joint Proxy Statement/Prospectus (as
defined in Section 3.20 below) with the Securities and Exchange Commission (the
"SEC") in accordance with the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), (iii) such consents, approvals, orders, authorizations,
registrations, declarations and filings as may be required under applicable
state securities laws and the laws of any foreign country and (iv) such other
consents, authorizations, filings, approvals and registrations which, if not
obtained or made, would not be reasonably likely to have a Silknet Material
Adverse Effect.

     Section 3.04      SEC Filings; Financial Statements.

                  (a) Silknet has filed and made available to Kana all forms,
reports and documents required to be filed by Silknet with the SEC since May 5,
1999 other than registration statements on Form S-8 (collectively, the "Silknet
SEC Reports"). The Silknet SEC Reports (i) at the time filed, complied in all
material respects with the applicable requirements of the Securities Act of
1933, as amended (the "Securities Act"), and the Exchange Act, as the case may
be, and (ii) did not at the time they were filed (or if amended or superseded by
a filing prior to the date of this Agreement, then as and on the date so amended
or superseded) contain any untrue statement of a material fact or omit to state
a material fact required to be stated in such Silknet SEC Reports or necessary
in order to make the statements in such Silknet SEC Reports, in the light of the
circumstances under which they were made, not misleading. Silknet's Subsidiaries
are not required to file any forms, reports or other documents with the SEC.

                                       9
<PAGE>   16
                  (b) Each of the consolidated financial statements (including,
in each case, any related notes) contained in the Silknet SEC Reports complied
as to form in all material respects with the applicable published rules and
regulations of the SEC with respect thereto, was prepared in accordance with
generally accepted accounting principles applied on a consistent basis
throughout the periods involved (except as may be indicated in the notes to such
financial statements or, in the case of unaudited statements, as permitted by
Form 10-Q of the SEC) and fairly presented the consolidated financial position
of Silknet and its Subsidiaries as of the dates and the consolidated results of
its operations and cash flows for the periods indicated, except that the
unaudited interim financial statements were or are subject to normal and
recurring year-end adjustments which were not or are not expected to be material
in amount. The audited balance sheet of Silknet as of June 30, 1999 is referred
to herein as the "Silknet Balance Sheet."

     Section 3.05      No Undisclosed Liabilities.

                  Except as disclosed in the Silknet SEC Reports filed prior to
the date hereof, and except for normal or recurring liabilities incurred since
December 31, 1999 in the ordinary course of business consistent with past
practices, Silknet and its Subsidiaries do not have any liabilities, either
accrued, contingent or otherwise (whether or not required to be reflected in
financial statements in accordance with generally accepted accounting
principles), and whether due or to become due, which individually or in the
aggregate would have a Silknet Material Adverse Effect.

     Section 3.06      Absence Of Certain Changes Or Events.

                  Except as disclosed in the Silknet SEC Reports filed prior to
the date hereof or disclosed in writing by Silknet to Kana on or prior to the
date hereof, since the date of the Silknet Balance Sheet, Silknet and its
Subsidiaries have conducted their businesses only in the ordinary course and in
a manner consistent with past practice and, since such date, there has not been
(i) any Silknet Material Adverse Effect; (ii) any damage, destruction or loss
(whether or not covered by insurance) with respect to Silknet or any of its
Subsidiaries having a Silknet Material Adverse Effect; (iii) any material change
by Silknet in its accounting methods, principles or practices to which Kana has
not previously consented in writing; (iv) any revaluation by Silknet of any of
its assets having a Silknet Material Adverse Effect; or (v) any other action or
event that would have required the consent of Kana pursuant to Section 5.01 of
this Agreement had such action or event occurred after the date of this
Agreement and that, individually or in the aggregate, has had a Silknet Material
Adverse Effect.

     Section 3.07      Taxes.

                  (a) For the purposes of this Agreement, the terms "Tax" and,
collectively, "Taxes" mean any and all material federal, state, local and
foreign taxes, assessments and other governmental charges, duties, impositions
and liabilities, including taxes based upon or measured by gross receipts,
income, profits, sales, use and occupation, and value added, ad valorem,
transfer, gains, franchise, withholding, payroll, recapture, employment, excise,
unemployment insurance, social security, business license, occupation, business
organization, stamp, environmental and property taxes, together with all
interest, penalties and additions imposed with respect to such amounts and any
obligations under any agreements or

                                       10
<PAGE>   17
arrangements with any other person with respect to such amounts and including
any liability for taxes of a predecessor entity.

                  (b) Silknet and each of its Subsidiaries have (i) filed all
federal, state, local and foreign tax returns and reports required to be filed
by them prior to the date of this Agreement (taking into account extensions),
(ii) paid or accrued all Taxes due and payable, and (iii) paid or accrued all
Taxes for which a notice of assessment or collection has been received (other
than amounts being contested in good faith by appropriate proceedings), except
in the case of clause (i), (ii) or (iii) for any such filings, payments or
accruals which are not reasonably likely, individually or in the aggregate, to
have a Silknet Material Adverse Effect. Neither the Internal Revenue Service
(the "IRS") nor any other taxing authority has asserted any claim for taxes, or
to the actual knowledge of the executive officers of Silknet or any of its
Subsidiaries, is threatening to assert any claims for Taxes, which claims,
individually or in the aggregate, are reasonably likely to have a Silknet
Material Adverse Effect. Silknet and each of its Subsidiaries have withheld or
collected and paid over to the appropriate governmental authorities (or are
properly holding for such payment) all Taxes required by law to be withheld or
collected, except for amounts which are not reasonably likely, individually or
in the aggregate, to have a Silknet Material Adverse Effect. Neither Silknet nor
any of its Subsidiaries has made an election under Section 341(f) of the
Internal Revenue Code, except for any such election which shall not have a
Silknet Material Adverse Effect. There are no liens for Taxes upon the assets of
Silknet or its Subsidiaries (other than liens for Taxes that are not yet due or
that are being contested in good faith by appropriate proceedings), except for
liens which would not, individually or in the aggregate, have a Silknet Material
Adverse Effect.

     Section 3.08      Properties.

                  (a) Silknet has provided to Kana a true and complete list of
all material real property leased by Silknet or its Subsidiaries (collectively
"Material Lease(s)") and the location of the premises. Neither Silknet nor any
Subsidiary is in default under any such leases, except where the existence of
such defaults, individually or in the aggregate, is not reasonably likely to
have a Silknet Material Adverse Effect.

                  (b) Silknet owns no real property.

     Section 3.09      Intellectual Property.

                  (a) Except as disclosed in Section 3.09 of the Silknet
Disclosure Schedule, Silknet and its Subsidiaries own, or are licensed or
otherwise possess legally enforceable rights to use, all patents, trademarks,
trade names, service marks, copyrights and mask works, any applications for and
registrations of such patents, trademarks, trade names, service marks,
copyrights and mask works, and all processes, formulae, methods schematics,
technology, know how, computer software programs or applications and tangible or
intangible proprietary information or material that are necessary to conduct the
business of Silknet and its Subsidiaries as currently conducted or planned to be
conducted by Silknet and its Subsidiaries (the "Silknet Intellectual Property
Rights").

                                       11
<PAGE>   18
                  (b) Except as disclosed in Section 3.09 of the Silknet
Disclosure Schedule, neither Silknet nor any of its Subsidiaries is, or will be
as a result of the execution and delivery of this Agreement or the performance
of its obligations under this Agreement, in breach of any material license,
sublicense or other agreement relating to the Silknet Intellectual Property
Rights or any material license, sublicense or other agreement pursuant to which
Silknet or any of its Subsidiaries is authorized to use any third party patents,
trademarks or copyrights, including software, which are incorporated in or form
a part of any product of Silknet or any of its Subsidiaries that is material to
the business of Silknet and its Subsidiaries, taking Silknet and its
Subsidiaries together as a whole, and where such breach would have a Silknet
Material Adverse Effect.

                  (c) Except as disclosed in Schedule 3.09 of the Silknet
Disclosure Schedule, (i) all patents, registered trademarks, service marks and
copyrights which are held by Silknet or any of its Subsidiaries, and which are
material to the business of Silknet and its Subsidiaries, taking Silknet and its
Subsidiaries together as a whole, are valid and subsisting; (ii) Silknet has not
been sued in any suit, action or proceeding which involves a claim of
infringement of any patents, trademarks, service marks, copyrights or violation
of any trade secret or other proprietary right of any third party; and (iii) the
manufacturing, marketing, licensing or sale of Silknet's products does not
infringe any patent, trademark, service mark, copyright, trade secret or other
proprietary right of any third party, which infringement, either individually or
in the aggregate, could reasonably be expected to have a Silknet Material
Adverse Effect.

                  (d) Silknet has taken all actions necessary and appropriate to
assure that there shall be no material adverse change in the delivery of
Silknet's products and services by reason of the advent of the year 2000, and
warrants that all of its products (including products currently under
development) will, without interruption or manual intervention, continue to
consistently, predictably and accurately record, store, process, calculate and
present calendar dates falling on and after (and if applicable, spans of time
including) January 1, 2000, and will consistently, predictably and accurately
calculate any information dependent on or relating to such dates in the same
manner, and with the same functionality, data integrity and performance, as such
products record, store, process, calculate and present calendar dates on or
before December 31, 1999, or calculate any information dependent on or relating
to such dates.

     Section 3.10      Agreements, Contracts And Commitments.

                  Neither Silknet nor any of its Subsidiaries has breached, or
received in writing any claim or notice that it has breached, any of the terms
or conditions of any material agreement, contract or commitment to which it is a
party or by which any of its assets and properties are bound ("Silknet Material
Contracts") in such a manner as, individually or in the aggregate, is reasonably
likely to have a Silknet Material Adverse Effect. Each Silknet Material Contract
that has not expired by its terms is in full force and effect and is not subject
to any material default thereunder of which Silknet is aware by any party
obligated to Silknet or any of its Subsidiaries pursuant to such Silknet
Material Contract.

                                       12
<PAGE>   19
     Section 3.11      Litigation.

                  Except as described in the Silknet SEC Reports filed prior to
the date hereof, there is no action, suit or proceeding, claim, arbitration or
investigation against Silknet or any of its Subsidiaries pending or as to which
Silknet or any such Subsidiary has received any written notice of assertion,
which, individually or in the aggregate, if determined adversely to Silknet or
any such Subsidiary, would be reasonably likely to have a Silknet Material
Adverse Effect or would materially impair or delay the ability of Silknet to
consummate the transactions contemplated by this Agreement nor is there, to the
knowledge of Silknet, any claim, action, suit, proceeding or investigation
described in Section 6.17(d), or any basis therefor.

     Section 3.12      Environmental Matters.

                  (a) Except as disclosed in the Silknet SEC Reports filed prior
to the date hereof: (i) Silknet and its Subsidiaries have complied with all
applicable Environmental Laws (as defined in Section 3.12(b)); (ii) the
properties currently owned or operated by Silknet and its Subsidiaries
(including soils, groundwater, surface water, buildings or other structures) are
not contaminated with any Hazardous Substances (as defined in Section 3.12(c));
(iii) the properties formerly owned or operated by Silknet or any of its
Subsidiaries were not contaminated with Hazardous Substances during the period
of ownership or operation by Silknet or its Subsidiaries; (iv) neither Silknet
nor any of its Subsidiaries is subject to liability for any Hazardous Substance
disposal or contamination on any third party property; (v) neither Silknet nor
any Subsidiary has been associated with any release or threat of release of any
Hazardous Substance; (vi) neither Silknet nor any of its Subsidiaries has
received any notice, demand, letter, claim or request for information alleging
that Silknet or any of its Subsidiaries may be in violation of or liable under
any Environmental Law; (vii) neither Silknet nor any of its Subsidiaries is
subject to any orders, decrees, injunctions or other arrangements with any
Governmental Entity or is subject to any indemnity or other agreement with any
third party relating to liability under any Environmental Law or relating to
Hazardous Substances; and (viii) there are no circumstances or conditions
involving Silknet or any of its Subsidiaries that could reasonably be expected
to result in any claims, liability, investigations, costs or restrictions on the
ownership, use or transfer of any property of Silknet or its Subsidiaries
pursuant to any Environmental Law.

                  (b) As used herein, the term "Environmental Law" means any
federal, state, local or foreign law, regulation, order, decree, permit,
authorization, opinion, common law or agency requirement relating to: (A) the
protection, investigation or restoration of the environment, health and safety,
or natural resources, (B) the handling, use, presence, disposal, release or
threatened release of any Hazardous Substance or (C) noise, odor, wetlands,
pollution, contamination or any injury or threat of injury to persons or
property.

                  (c) As used herein, the term "Hazardous Substance" means any
substance that is: (A) listed, classified or regulated pursuant to any
Environmental Law; (B) any petroleum product or by-product, asbestos-containing
material, lead-containing paint or plumbing, polychlorinated biphenyls,
radioactive materials or radon; or (C) any other substance which is the subject
of regulatory action by any Governmental Entity pursuant to any Environmental
Law.

                                       13
<PAGE>   20
     Section 3.13      Employee Benefit Plans.

                  (a) Silknet has listed in Section 3.13 of the Silknet
Disclosure Schedule all employee benefit plans (as defined in Section 3(3) of
the Employee Retirement Income Security Act of 1974, as amended ("ERISA")) and
all bonus, stock option, stock purchase, incentive, deferred compensation,
supplemental retirement, severance and other similar employee benefit plans, and
all unexpired severance agreements, written or otherwise, for the benefit of, or
relating to, any current or former employee of Silknet or any trade or business
(whether or not incorporated) which is a member or which is under common control
with Silknet (an "ERISA Affiliate") within the meaning of Section 414 of the
Internal Revenue Code, or any Subsidiary of Silknet (together, the "Silknet
Employee Plans").

                  (b) With respect to each Silknet Employee Plan, Silknet has
made available to Kana, a true and correct copy of (i) the most recent annual
report (Form 5500) filed with the IRS, (ii) such Silknet Employee Plan, (iii)
each trust agreement and group annuity contract, if any, relating to such
Silknet Employee Plan and (iv) the most recent actuarial report or valuation
relating to a Silknet Employee Plan subject to Title IV of ERISA.

                  (c) With respect to the Silknet Employee Plans, individually
and in the aggregate, no event has occurred, and to the knowledge of Silknet,
there exists no condition or set of circumstances in connection with which
Silknet could be subject to any liability that is reasonably likely to have a
Silknet Material Adverse Effect under ERISA, the Internal Revenue Code or any
other applicable law.

                  (d) With respect to the Silknet Employee Plans, individually
and in the aggregate, there are no funded benefit obligations for which
contributions have not been made or properly accrued and there are no unfunded
benefit obligations which have not been accounted for by reserves, or otherwise
properly footnoted in accordance with generally accepted accounting principles,
on the financial statements of Silknet, which obligations are reasonably likely
to have a Silknet Material Adverse Effect.

                  (e) Except as disclosed in Silknet SEC Reports filed prior to
the date of this Agreement or the Silknet Disclosure Schedule, and except as
provided for in this Agreement, neither Silknet nor any of its Subsidiaries is a
party to any oral or written (i) agreement with any officer or other key
employee of Silknet or any of its Subsidiaries, the benefits of which are
contingent, or the terms of which are materially altered, upon the occurrence of
a transaction involving Silknet of the nature contemplated by this Agreement,
(ii) agreement with any officer of Silknet or any of its Subsidiaries providing
any term of employment or compensation guarantee extending for a period longer
than one year from the date hereof and for the payment of compensation in excess
of $200,000 per annum, or (iii) agreement or plan, including any stock option
plan, stock appreciation right plan, restricted stock plan or stock purchase
plan, any of the benefits of which will be increased, or the vesting of the
benefits of which will be accelerated, by the occurrence of any of the
transactions contemplated by this Agreement or the Stock Option Agreements or
the value of any of the benefits of which will be calculated on the basis of any
of the transactions contemplated by this Agreement, except that (a) each
outstanding option under the Silknet Stock Plans other than the 1999
Non-Employee Director Stock Option Plan at the Effective Time shall immediately
accelerate and vest as to twenty-five percent (25%) of the

                                       14
<PAGE>   21
number of option shares for which that option is not otherwise vested and
exercisable immediately prior to the Effective Time in accordance with the
normal vesting schedule applicable to that option, and each person who at the
Effective Time holds any unvested shares previously purchased under any of the
Silknet Stock Plans shall at the Effective Time immediately vest as to
twenty-five percent (25%) of those unvested shares, and (b) each outstanding
option under the Silknet 1999 Non-Employee Director Stock Option Plan at the
Effective Time shall immediately become fully vested and exercisable following
the Effective Time.

     Section 3.14      Compliance With Laws.

                  Silknet and each of its Subsidiaries has complied with, is not
in violation of, and has not received any notices of violation with respect to,
any federal, state or local statute, law or regulation with respect to the
conduct of its business, or the ownership or operation of its business, except
for failures to comply or violations which, individually or in the aggregate,
have not had and are not reasonably likely to have a Silknet Material Adverse
Effect.

     Section 3.15      Tax Matters.

                  To its knowledge, neither Silknet nor any of its Affiliates
has taken or agreed to take any action which would prevent the Merger from
constituting a transaction qualifying as a reorganization under Section 368(a)
of the Internal Revenue Code.

     Section 3.16      Labor Matters.

                  Neither Silknet nor any of its Subsidiaries is a party to or
otherwise bound by any collective bargaining agreement, contract or other
agreement or understanding with a labor union or labor organization, nor, as of
the date hereof, is Silknet or any of its Subsidiaries the subject of any
material proceeding asserting that Silknet or any of its Subsidiaries has
committed an unfair labor practice or is seeking to compel it to bargain with
any labor union or labor organization nor, as of the date of this Agreement, is
there pending or, to the knowledge of Silknet, threatened, any material labor
strike, dispute, walkout, work stoppage, slow-down or lockout involving Silknet
or any of its Subsidiaries.

     Section 3.17      Insurance.

                  All material fire and casualty, general liability, business
interruption, product liability, and sprinkler and water damage insurance
policies maintained by Silknet or any of its Subsidiaries are with reputable
insurance carriers, and copies or a summary of such policies have been made
available to Kana.

     Section 3.18      No Existing Discussions.

                  As of the date hereof, Silknet is not engaged, directly or
indirectly, in any discussions or negotiations with any other party with respect
to a Silknet Takeover Proposal (as defined in Section 6.02(d)).

                                       15
<PAGE>   22
     Section 3.19      Interested Party Transactions.

                  Except as set forth in the Silknet SEC Reports or by virtue of
the Merger, no event has occurred that would be required to be reported by
Silknet as a Certain Relationship or Related Transaction pursuant to Item 404 of
Regulation S-K promulgated by the SEC.

     Section 3.20      Registration Statement; Joint Proxy Statement/Prospectus.

                  The information supplied by Silknet for inclusion in the
registration statement of Kana on Form S-4 pursuant to which shares of Kana
Common Stock issued in the Merger will be registered with the SEC (the
"Registration Statement") shall not contain, at the time the Registration
Statement is declared effective by the SEC, any untrue statement of a material
fact or omit to state any material fact required to be stated in the
Registration Statement or necessary in order to make the statements in the
Registration Statement, in light of the circumstances under with they were made,
not misleading. The information supplied by Silknet for inclusion in the joint
proxy statement/prospectus (the "Joint Proxy Statement/Prospectus") to be sent
to the stockholders of Silknet in connection with the special meeting of Silknet
stockholders to consider this Agreement and the Merger (the "Silknet
Stockholders Meeting") and to the stockholders of Kana in connection with the
special meeting of Kana stockholders to consider the issuance of Kana Common
Stock in connection with the Merger (the "Kana Stockholders Meeting") shall not,
on the date the Joint Proxy Statement/Prospectus is first mailed to stockholders
of Kana and Silknet, at the time of the Silknet Stockholders Meeting, at the
time of the Kana Stockholders Meeting or at the Effective Time, contain any
statement which, at such time and in light of the circumstances under which it
was made, is false or misleading with respect to any material fact, or omit to
state any material fact necessary in order to make the statements made in the
Joint Proxy Statement/Prospectus not false or misleading or omit to state any
material fact necessary to correct any statement in any earlier communication
with respect to the solicitation of proxies for the Kana Stockholders Meeting or
the Silknet Stockholders Meeting which has become false or misleading. If at any
time prior to the Effective Time any event relating to Silknet or any of its
affiliates should be discovered by Silknet which should be set forth in an
amendment to the Registration Statement or a supplement to the Joint Proxy
Statement/Prospectus, Silknet shall promptly inform Kana.

     Section 3.21      Payments Resulting from Mergers.

                  (a) The consummation or announcement of any transaction
contemplated by this Agreement or the Silknet Stock Option Agreement will not
(either alone or upon the occurrence of any additional or further acts or
events) result in any (i) payment (whether of severance pay or otherwise)
becoming due from Silknet or any of its Subsidiaries to any officer, employee,
former employee or director thereof or to the trustee under any "rabbi trust" or
similar arrangement pursuant to any management, employment, deferred
compensation, severance (including any payment, right or benefit resulting from
a change in control), bonus or other contract for personal services with any
officer, director or employee or any plan agreement or understanding similar to
any of the foregoing, or (ii) benefit under any Silknet benefit plan being
established or becoming accelerated, vested or payable.

                                       16
<PAGE>   23
                  (b) James C. Wood has agreed to enter into an amendment to his
employment agreement providing for the waiver of any benefits that would
otherwise be due Mr. Wood (including severance payments) as a result of the
Merger. Nigel Donovan has agreed to deliver a written acknowledgement that the
Merger, and his subsequent employment by Kana, will not result in any benefits
becoming due to Mr. Donovan. Patrick J. Scannell, has agreed to amend his
current employment agreement to provide for the waiver of any cash payments as a
result of the Merger, and to provide that his employment agreement will be
amended so that he will continue providing services to Kana for 180 days after
the date hereof, on which date Mr. Scannell will be entitled to the benefits
under his employment agreement (including acceleration of his then unvested
options and severance payments equal to one year's salary).

     Section 3.22      Opinion Of Financial Advisor.

                  The financial advisor of Silknet, Credit Suisse First Boston,
has delivered to Silknet an opinion dated the date of this Agreement to the
effect that the Exchange Ratio is fair to the holders of Silknet Common Stock
from a financial point of view.

     Section 3.23      Section 203 of the DGCL Not Applicable; Silknet Rights
                       Plan.

                  (a) Section 203 of the DGCL is not applicable to Silknet or
(by reason of Silknet's participation therein) the Merger. No other "fair
price," "moratorium," "control share acquisition" or other similar anti-takeover
statute or regulation is applicable to Silknet or (by reason of Silknet's
participation therein) the Merger or the other transactions contemplated by this
Agreement.

                  (b) The execution, delivery and performance of this Agreement
and the Silknet Stock Option Agreement and the consummation of the Merger will
not cause any change, effect or result under any stockholder rights plan which
is or will as of the Effective Time be in effect (a "Silknet Rights Plan") which
is adverse to the interests of Kana.

     Section 3.24      Voting Requirements.

                  The affirmative vote at the Silknet Stockholders Meeting of
the holders of a majority of the voting power of all outstanding shares of
Silknet Common Stock to adopt this Agreement (the "Silknet Stockholder
Approval") is the only vote of the holders of any class or series of Silknet's
capital stock necessary to approve and adopt this Agreement, the Silknet Stock
Option Agreement and the transactions contemplated hereby and thereby.

     Section 3.25      Brokers.

                  No broker, investment banker, financial advisor or other
person, other than Credit Suisse First Boston Corporation, the fees and expenses
of which will be paid by Silknet, is entitled to any broker's, finder's,
financial advisor's or other similar fee or commission in connection with the
transactions contemplated by this Agreement and the Stock Option Agreements
based upon arrangements made by or on behalf of Silknet. Silknet has furnished
to Kana true and complete copies of all agreements under which any such fees or
expenses are payable and all indemnification and other agreements related to the
engagement of the persons to whom such fees are payable.

                                       17
<PAGE>   24
     Section 3.26      Certain Contracts.

                  Neither Silknet nor any of its Subsidiaries is a party to or
bound by any non-competition agreement or any other similar agreement or
obligation which purports to limit in any material respect the manner in which,
or the localities in which, all or any material portion of the business of
Silknet and its Subsidiaries, taken as a whole, is conducted.

     Section 3.27      Silknet Voting Agreement.

                  Each officer, director and affiliate under the control of
Silknet is listed on Schedule 3.27 and has executed and delivered to Kana a
voting agreement, substantially in the form of Exhibit A hereto.

                                  ARTICLE IV.

                     REPRESENTATIONS AND WARRANTIES OF KANA

                  Kana and Merger Sub represent and warrant to Silknet that the
statements contained in this Article IV are true and correct, except as set
forth in the disclosure schedule delivered by Kana to Silknet on or before the
date of this Agreement (the "Kana Disclosure Schedule"). The Kana Disclosure
Schedule shall be arranged in paragraphs corresponding to the numbered and
lettered sections contained in this Article IV and the disclosure in any
paragraph shall qualify other sections in this Article IV only to the extent
that it is reasonably apparent from a reading of such document that it also
qualifies or applies to such other sections.

     Section 4.01      Organization Of Kana And Merger Sub.

                  Each of Kana and Merger Sub and Kana's other Subsidiaries is a
corporation duly organized, validly existing and in good standing under the laws
of the jurisdiction of its incorporation, has all requisite corporate power to
own, lease and operate its property and to carry on its business as now being
conducted and as proposed to be conducted, and is duly qualified to do business
and is in good standing as a foreign corporation in each jurisdiction in which
the failure to be so qualified would have a Kana Material Adverse Effect as
defined in Section 9.03(b). Except as set forth in the Kana SEC Reports (as
defined in Section 4.04) filed prior to the date hereof, neither Kana nor any of
its Subsidiaries directly or indirectly owns any equity or similar interest in,
or any interest convertible into or exchangeable or exercisable for, any
corporation, partnership, joint venture or other business association or entity,
excluding securities in any publicly traded company held for investment by Kana
and comprising less than five percent (5%) of the outstanding stock of such
company.

     Section 4.02      Kana Capital Structure.

                  (a) The authorized capital stock of Kana consists of
100,000,000 shares of Common Stock, $.001 par value, and 5,000,000 shares of
Preferred Stock, $.001 par value ("Kana Preferred Stock"). As of February 3,
2000, (i) 30,391,355 shares of Kana Common Stock were issued and outstanding,
all of which are validly issued, fully paid and nonassessable, and (ii) no
shares of Kana Common Stock were held in the treasury of Kana or by Subsidiaries
of

                                       18
<PAGE>   25
Kana. The Kana Disclosure Schedule shows the number of shares of Kana Common
Stock reserved for future issuance pursuant to stock options granted and
outstanding as of February 3, 2000 and the plans under which such options were
granted (collectively, the "Kana Stock Plans"). No material change in such
capitalization has occurred between December 31, 2000 and the date of this
Agreement. As of the date of this Agreement, none of the shares of Kana
Preferred Stock is issued and outstanding. All shares of Kana Common Stock
subject to issuance as specified above are duly authorized and, upon issuance on
the terms and conditions specified in the instruments pursuant to which they are
issuable, shall be validly issued, fully paid and nonassessable. There are no
obligations, contingent or otherwise, of Kana to repurchase, redeem or otherwise
acquire any shares of Kana Common Stock or the capital stock of any of its
Subsidiaries or to provide funds to or make any material investment (in the form
of a loan, capital contribution or otherwise) in any such Subsidiary or any
other entity other than guarantees of bank obligations of Subsidiaries entered
into in the ordinary course of business, except for repurchase rights of Kana
under the Kana stock option plans, or under any stock option agreements pursuant
to which options were granted under these plans. All of the outstanding shares
of capital stock of each of Kana's Subsidiaries are duly authorized, validly
issued, fully paid and nonassessable and all such shares (other than directors'
qualifying shares in the case of foreign Subsidiaries) are owned by Kana or
another Subsidiary free and clear of all security interests, liens, claims,
pledges, agreements, limitations in Kana's voting rights, charges or other
encumbrances of any nature.

                  (b) Except and as disclosed in Section 4.02 of the Kana
Disclosure Schedule or as set forth in this Section 4.02 or as reserved for
future grants of options under the Kana Stock Plans or the Kana Stock Option
Agreement, there are no equity securities of any class of Kana or any of its
Subsidiaries, or any security exchangeable into or exercisable for such equity
securities, issued, reserved for issuance or outstanding. There are no voting
trusts, proxies or other voting agreements or understandings with respect to the
shares of capital stock of Kana and to which Kana is a party.

     Section 4.03      Authority; No Conflict; Required Filings And Consents.

                  (a) Each of Kana and Merger Sub has all requisite corporate
power and authority to enter into this Agreement and the Kana Stock Option
Agreement and to consummate the transactions contemplated hereby and thereby.
The execution and delivery of this Agreement and the Kana Stock Option Agreement
and the consummation of the transactions contemplated by this Agreement and by
the Kana Stock Option Agreement by Kana and Merger Sub have been duly authorized
by all necessary corporate action on the part of each of Kana and Merger Sub
(including the approval of the Merger by Kana as the sole stockholder of Merger
Sub), subject only to the approval of the Kana Voting Proposal (as defined in
Section 6.03(a) by Kana stockholders. This Agreement and the Kana Stock Option
Agreement have been duly executed and delivered by each of Kana and, in the case
of this Agreement, Merger Sub constitute the valid and binding obligations of
each of Kana and Merger Sub, enforceable in accordance with their terms, subject
to the Bankruptcy and Equity Exception.

                  (b) The execution and delivery of this Agreement and the Kana
Stock Option Agreement by each of Kana and Merger Sub does not, and the
consummation of the transactions contemplated by this Agreement and the Kana
Stock Option Agreement will not, (i) conflict

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<PAGE>   26
with, or result in any violation or breach of, any provision of the Certificate
of Incorporation or Bylaws of Kana or the Certificate of Incorporation or Bylaws
of Merger Sub, (ii) result in any violation or breach of, or constitute (with or
without notice or lapse of time, or both) a default (or give rise to a right of
termination, cancellation or acceleration of any obligation or loss of any
material benefit) under, or require a consent or waiver under, any of the terms,
conditions or provisions of any note, bond, mortgage, indenture, lease, contract
or other agreement, instrument or obligation to which Kana or any of its
Subsidiaries is a party or by which any of them or any of their properties or
assets may be bound, or (iii) conflict with or violate any permit, concession,
franchise, license, judgment, order, decree, statute, law, ordinance, rule or
regulation applicable to Kana or any of its Subsidiaries or any of its or their
properties or assets, except in the case of (ii) and (iii) for any such
conflicts, violations, defaults, terminations, cancellations or accelerations
which, individually or in the aggregate, would have a Kana Material Adverse
Effect.

                  (c) No consent, approval, order or authorization of, or
registration, declaration or filing with, any Governmental Entity is required by
or with respect to Kana or any of its Subsidiaries in connection with the
execution and delivery of this Agreement and the Kana Stock Option Agreement or
the consummation of the transactions contemplated hereby, except for (i) the
filing of the Registration Statement with the SEC in accordance with the
Securities Act, (ii) the filing of the Certificate of Merger with the Delaware
Secretary of State, (iii) the filing of the Joint Proxy Statement/Prospectus
with the SEC in accordance with the Exchange Act, (iv) such consents, approvals,
orders, authorizations, registrations, declarations and filings as may be
required under applicable state securities laws and the laws of any foreign
country and (v) such other consents, authorizations, filings, approvals and
registrations which, if not obtained or made, would not be reasonably likely to
have a Kana Material Adverse Effect.

     Section 4.04      SEC Filings; Financial Statements.

                  (a) Kana has filed and made available to Silknet all forms,
reports and documents required to be filed by Kana with the SEC since September
21, 1999 other than registration statements on Form S-8 (collectively, the "Kana
SEC Reports"). The Kana SEC Reports (i) at the time filed, complied in all
material respects with the applicable requirements of the Securities Act and the
Exchange Act, as the case may be, and (ii) did not at the time they were filed
(or if amended or superseded by a filing prior to the date of this Agreement,
then as and on the date so amended or superseded) contain any untrue statement
of a material fact or omit to state a material fact required to be stated in
such Kana SEC Reports or necessary in order to make the statements in such Kana
SEC Reports, in the light of the circumstances under which they were made, not
misleading. Kana's Subsidiaries are not required to file any forms, reports or
other documents with the SEC.

                  (b) Each of the consolidated financial statements (including,
in each case, any related notes) contained in the Kana SEC Reports complied as
to form in all material respects with the applicable published rules and
regulations of the SEC with respect thereto, was prepared in accordance with
generally accepted accounting principles applied on a consistent basis
throughout the periods involved (except as may be indicated in the notes to such
financial statements or, in the case of unaudited statements, as permitted by
Form 10-Q of the SEC) and fairly presented the consolidated financial position
of Kana and its Subsidiaries as of the dates

                                       20
<PAGE>   27
and the consolidated results of its operations and cash flows for the periods
indicated, except that the unaudited interim financial statements were or are
subject to normal and recurring year-end adjustments which were not or are not
expected to be material in amount. The audited balance sheet of Kana as of
December 31, 1999 is referred to herein as the "Kana Balance Sheet."

     Section 4.05      No Undisclosed Liabilities.

                  Except as disclosed in the Kana SEC Reports filed prior to the
date hereof, and except for normal or recurring liabilities incurred since
December 31, 1999 in the ordinary course of business consistent with past
practices, Kana and its Subsidiaries do not have any liabilities, either
accrued, contingent or otherwise (whether or not required to be reflected in
financial statements in accordance with generally accepted accounting
principles), and whether due or to become due, which individually or in the
aggregate, would have a Kana Material Adverse Effect.

     Section 4.06      Absence Of Certain Changes Or Events.

                  Except as disclosed in the Kana SEC Reports filed prior to the
date hereof or disclosed in writing by Kana to Silknet on or prior to the date
hereof, since the date of the Kana Balance Sheet, Kana and its Subsidiaries have
conducted their businesses only in the ordinary course and in a manner
consistent with past practice and, since such date, there has not been (i) any
Kana Material Adverse Effect; (ii) any damage, destruction or loss (whether or
not covered by insurance) with respect to Kana or any of its Subsidiaries having
a Kana Material Adverse Effect; (iii) any material change by Kana in its
accounting methods, principles or practices to which Silknet has not previously
consented in writing; (iv) any revaluation by Kana of any of its assets having a
Kana Material Adverse Effect; or (v) any other action or event that would have
required the consent of Silknet pursuant to Section 5.01 of this Agreement had
such action or event occurred after the date of this Agreement and that,
individually or in the aggregate, has had a Kana Material Adverse Effect.

     Section 4.07      Taxes.

                  Kana and each of its Subsidiaries have (i) filed all federal,
state, local and foreign tax returns and reports required to be filed by them
prior to the date of this Agreement (taking into account extensions), (ii) paid
or accrued all Taxes due and payable, and (iii) paid or accrued all Taxes for
which a notice of assessment or collection has been received (other than amounts
being contested in good faith by appropriate proceedings), except in the case of
clause (i), (ii) or (iii) for any such filings, payments or accruals which are
not reasonably likely, individually or in the aggregate, to have a Kana Material
Adverse Effect. Neither the IRS nor any other taxing authority has asserted any
claim for Taxes, or to the actual knowledge of the executive officers of Kana or
any of its Subsidiaries, is threatening to assert any claims for Taxes, which
claims, individually or in the aggregate, are reasonably likely to have a Kana
Material Adverse Effect. Kana and each of its Subsidiaries have withheld or
collected and paid over to the appropriate governmental authorities (or are
properly holding for such payment) all Taxes required by law to be withheld or
collected, except for amounts which are not reasonably likely, individually or
in the aggregate, to have a Kana Material Adverse Effect. Neither Kana nor any
of its Subsidiaries has made an election under Section 341(f) of the Internal
Revenue Code, except for any such

                                       21
<PAGE>   28
election which shall not have a Kana Material Adverse Effect. There are no liens
for Taxes upon the assets of Kana or any of its Subsidiaries (other than liens
for Taxes that are not yet due or that are being contested in good faith by
appropriate proceedings), except for liens which are not reasonably likely,
individually or in the aggregate, to have a Kana Material Adverse Effect.

     Section 4.08      Agreements, Contracts And Commitments.

                  Neither Kana nor any of its Subsidiaries has breached, or
received in writing any claim or notice that it has breached, any of the terms
or conditions of any material agreement, contract or commitment to which it is a
party or by which any of its assets or properties are bound ("Kana Material
Contracts") in such a manner as, individually or in the aggregate, is reasonably
likely to have a Kana Material Adverse Effect. Each Kana Material Contract that
has not expired by its terms is in full force and effect and is not subject to
any material default thereunder of which Kana is aware by any party obligated to
Kana or any of its Subsidiaries pursuant to such Kana Material Contract.

     Section 4.09      Litigation.

                  Except as described in the Kana SEC Reports filed prior to the
date hereof, there is no action, suit or proceeding, claim, arbitration or
investigation against Kana or any of its Subsidiaries pending or as to which
Kana or any of its Subsidiaries has received any written notice of assertion,
which, individually or in the aggregate, if determined adversely to Kana or any
such Subsidiary, would be reasonably likely to have a Kana Material Adverse
Effect or would materially impair or delay the ability of Kana to consummate the
transactions contemplated by this Agreement.

     Section 4.10      Employee Benefit Plans.

                  With respect to the Kana Employee Plans, individually and in
the aggregate, there are no funded benefit obligations for which contributions
have not been made or properly accrued and there are no unfunded benefit
obligations which have not been accounted for by reserves, or otherwise properly
footnoted in accordance with generally accepted accounting principles, on the
financial statements of Kana, which obligations are reasonably likely to have a
Kana Material Adverse Effect.

     Section 4.11      Compliance With Laws.

                  Kana and each of its Subsidiaries has complied with, is not in
violation of, and has not received any notices of violation with respect to, any
federal, state or local statute, law or regulation with respect to the conduct
of its business, or the ownership or operation of its business, except for
failures to comply or violations which, individually or in the aggregate, have
not had and are not reasonably likely to have a Kana Material Adverse Effect.

     Section 4.12      Tax Matters.

                  To its knowledge, neither Kana nor any of its Affiliates has
taken or agreed to take any action which would prevent the Merger from
constituting a transaction qualifying as a reorganization under Section 368(a)
of the Internal Revenue Code.

                                       22
<PAGE>   29
     Section 4.13      Registration Statement; Joint Proxy Statement/Prospectus.

                  The information supplied by Kana for inclusion in the
Registration Statement shall not contain, at the time the Registration Statement
is declared effective by the SEC, any untrue statement of a material fact or
omit to state any material fact required to be stated in the Registration
Statement or necessary in order to make the statements in the Registration
Statement, in light of the circumstances under with they were made, not
misleading. The information supplied by Kana for inclusion in the Joint Proxy
Statement/Prospectus to be sent to the stockholders of Silknet in connection
with the Silknet Stockholders Meeting and to the stockholders of Kana in
connection with the Kana Stockholders Meeting shall not, on the date the Joint
Proxy Statement/Prospectus is first mailed to stockholders of Kana and Silknet,
at the time of the Silknet Stockholders Meeting, at the time of the Kana
Stockholders Meeting or at the Effective Time, contain any statement which, at
such time and in light of the circumstances under which it was made, is false or
misleading with respect to any material fact, or omit to state any material fact
necessary in order to make the statements made in the Joint Proxy
Statement/Prospectus not false or misleading or omit to state any material fact
necessary to correct any statement in any earlier communication with respect to
the solicitation of proxies for the Kana Stockholders Meeting or the Silknet
Stockholders Meeting which has become false or misleading. If at any time prior
to the Effective Time any event relating to Kana or any of its affiliates should
be discovered by Kana which should be set forth in an amendment to the
Registration Statement or a supplement to the Joint Proxy Statement/Prospectus,
Kana shall promptly inform Silknet.

     Section 4.14      Opinion Of Financial Advisor.

                  The financial advisor of Kana, Goldman, Sachs & Co., has
delivered to Kana an opinion dated the date of this Agreement to the effect that
the Exchange Ratio is fair to Kana from a financial point of view.

     Section 4.15      Voting Requirements.

                  No vote of the holders of shares of Kana Common Stock or any
other class or series of capital stock of Kana is necessary to approve and adopt
this Agreement and the Kana Option Agreement and the transactions contemplated
hereby and thereby other than the approval of the Kana Voting Proposal.

     Section 4.16      Brokers.

                  No broker, investment banker, financial advisor or other
person, other than Goldman, Sachs & Co., the fees and expenses of which will be
paid by Kana, is entitled to any broker's, finder's, financial advisor's or
other similar fee or commission in connection with the transactions contemplated
by this Agreement and the Stock Option Agreements based upon arrangements made
by or on behalf of Kana.

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<PAGE>   30
     Section 4.17      Kana Voting Agreement.

                  Each officer, director and affiliate under the control of Kana
is listed on Schedule 4.17 and has executed and delivered to Silknet a voting
agreement, substantially in the form of Exhibit B hereto.

     Section 4.18      Intellectual Property.

                  (a) Except as disclosed in Section 4.18 of the Kana Disclosure
Schedule, Kana and its Subsidiaries own, or are licensed or otherwise possess
legally enforceable rights to use, all patents, trademarks, trade names, service
marks, copyrights and mask works, any applications for and registrations of such
patents, trademarks, trade names, service marks, copyrights and mask works, and
all processes, formulae, methods schematics, technology, know how, computer
software programs or applications and tangible or intangible proprietary
information or material that are necessary to conduct the business of Kana and
its Subsidiaries as currently conducted or planned to be conducted by Kana and
its Subsidiaries (the "Kana Intellectual Property Rights").

                  (b) Except as disclosed in Section 4.18 of the Kana Disclosure
Schedule, neither Kana nor any of its Subsidiaries is, or will be as a result of
the execution and delivery of this Agreement of the performance of its
obligations under this Agreement, in breach of any material license, sublicense
or other agreement relating to the Kana Intellectual Property Rights or any
material license, sublicense or other agreement pursuant to which Kana or any of
its Subsidiaries is authorized to use any third party patents, trademarks or
copyrights, including software, which are incorporated in or form a part of any
product of Kana or any of its Subsidiaries that is material to the business of
Kana and its Subsidiaries, taking Kana and its Subsidiaries together as a whole,
and where such breach would have a Kana Material Adverse Effect.

                  (c) Except as disclosed in the Kana Disclosure Schedule, (i)
all patents, registered trademarks, service marks and copyrights which are held
by Kana or any of its Subsidiaries, and which are material to the business of
Kana and its Subsidiaries, taking Kana and its Subsidiaries together as a whole,
are valid and subsisting; (ii) Kana has not been sued in any suit, action or
proceeding which involves a claim of infringement of any patents, trademarks,
service marks, copyrights or violation of any trade secret or other proprietary
right of any third party where such proceeding would have a Kana Material
Adverse Effect; and (iii) the manufacturing, marketing, licensing or sale of
Kana's products does not infringe any patent, trademark, service mark,
copyright, trade secret or other proprietary right of any third party, which
infringement, either individually or in the aggregate, could reasonably be
expected to have a Kana Material Adverse Effect.

     Section 4.19      Certain Contracts.

                  Neither Kana nor any of its Subsidiaries is a party to or
bound by any non-competition agreement or any other similar agreement or
obligation which purports to limit in any material respect the manner in which,
or the localities in which, all or any material portion of the business of Kana
and its Subsidiaries, taken as a whole, is conducted.

                                       24
<PAGE>   31
                                   ARTICLE V.

                               CONDUCT OF BUSINESS

     Section 5.01      Covenants Of Silknet.

                  During the period from the date of this Agreement and
continuing until the earlier of the termination of this Agreement or the
Effective Time, Silknet agrees, as to itself and its Subsidiaries, except to the
extent that Kana shall otherwise consent in writing, to carry on its business in
the usual, regular and ordinary course in substantially the same manner as
previously conducted, and consistent with preserving and advancing the revenues
and results of operation of Silknet, to pay its debts and taxes when due subject
to good faith disputes over such debts or taxes, to pay or perform its other
obligations when due, and, to the extent consistent with such business, use all
reasonable efforts consistent with past practices and policies to preserve
intact its present business organization, keep available the services of its
present officers and key employees and preserve its relationships with
customers, suppliers, distributors, and others having business dealings with it,
except in each case where the failure to do so would not have a Silknet Material
Adverse Effect. Silknet shall promptly notify Kana of any material event or
occurrence not in the ordinary course of business of Silknet. Except as
expressly contemplated by this Agreement or as set forth in Section 5.01 of the
Silknet Disclosure Schedule, Silknet shall not (and shall not permit its
Subsidiaries to), without the written consent of Kana (which shall not be
unreasonably delayed):

                  (a) accelerate, amend or change the period of exercisability
of options or restricted stock granted under any employee stock plan of such
party or authorize cash payments in exchange for any options granted under any
of such plans except as required by the terms of such plans or any related
agreements in effect as of the date of this Agreement, and except that (a) the
vesting date of each outstanding option under the Silknet Stock Plans other than
the 1999 Non-Employee Director Stock Option Plan at the Effective Time shall
immediately accelerate by one year, and the vesting date of any unvested shares
previously purchased under any of the Silknet Stock Plans shall at the Effective
Time accelerate by one year, and (b) each outstanding option under the Silknet
1999 Non-Employee Director Stock Option Plan at the Effective Time shall
immediately become fully vested and exercisable following the Effective Time.

                  (b) declare or pay any dividends on or make any other
distributions (whether in cash, stock or property) in respect of any of its
capital stock, or split, combine or reclassify any of its capital stock or issue
or authorize the issuance of any other securities in respect of, in lieu of or
in substitution for shares of its capital stock, or purchase or otherwise
acquire, directly or indirectly, any shares of its capital stock except from
former employees, directors and consultants in accordance with agreements
providing for the repurchase of shares in connection with any termination of
service to such party;

                                       25
<PAGE>   32
                  (c) transfer or license to any person or entity or otherwise
extend, amend or modify in any material respect any rights to the Silknet
Intellectual Property Rights other than on a non-exclusive basis in the ordinary
course of business consistent with past practices;

                  (d) issue, deliver or sell, or authorize or propose the
issuance, delivery or sale of, any shares of its capital stock or securities
convertible into shares of its capital stock, or subscriptions, rights, warrants
or options to acquire, or other agreements or commitments of any character
obligating it to issue any such shares or other convertible securities, other
than (i) the grant of options consistent with past practices to existing
employees, not to exceed 25,000 shares, and to newly hired employees, which
hiring of new employees shall be in the ordinary course of business and which
options represent in the aggregate the right to acquire no more than 100,000
shares (net of cancellations) of Silknet Common Stock and which will not be
entitled to accelerated vesting as a result of the Merger, or (ii) the issuance
of shares of Silknet Common Stock pursuant to the exercise of options
outstanding on the date of this Agreement;

                  (e) acquire or agree to acquire by merging or consolidating
with, or by purchasing a substantial equity interest in or substantial portion
of the assets of, or by any other manner, any business or any corporation,
partnership or other business organization or division, or otherwise acquire or
agree to acquire any assets (other than inventory and other items in the
ordinary course of business);

                  (f) sell, lease, license or otherwise dispose of any material
properties or assets, except for transactions in the ordinary course of
business; provided, however, that in no event shall Silknet enter into any
agreement, option or other arrangements (including any joint venture) involving
the exclusive licensing of Silknet's name or system outside of the ordinary
course of business or inconsistent with past practice;

                  (g) (i) increase or agree to increase the compensation payable
or to become payable to its officers or employees, except for increases in
salary or wages of employees (other than officers) in accordance with past
practices, (ii) grant any additional severance or termination pay to, or enter
into any employment or severance agreements with, any employees or officers,
(iii) enter into any collective bargaining agreement (other than as required by
law or extensions to existing agreements in the ordinary course of business),
(iv) establish, adopt, enter into or amend any bonus, profit sharing, thrift,
compensation, stock option, restricted stock, pension, retirement, deferred
compensation, employment, termination, severance or other plan, trust, fund,
policy or arrangement for the benefit of any directors, officers or employees,
and except as contemplated by Section 3.21 and Section 5.01(a);

                  (h) amend or propose to amend its Certificate of Incorporation
or Bylaws, except as contemplated by this Agreement;

                  (i) enter into or amend in any material respect any OEM
agreement or any agreements pursuant to which any third party is granted
exclusive marketing, manufacturing or other rights with respect to any Silknet
product, process or technology;

                                       26
<PAGE>   33
                  (j) amend or terminate any material contract, agreement or
license to which it is a party except in the ordinary course of business or
where such action would not have a Silknet Material Adverse Effect;

                  (k) waive or release any material right or claim, except in
the ordinary course of business;

                  (l) initiate any litigation or arbitration proceeding without
otherwise first consulting with Kana or where the initiation of such
proceedings, if determined adversely, would have a Silknet Material Adverse
Effect;

                  (m) incur any indebtedness in excess of $10,000,000 for
borrowed money other than in the ordinary course of business;

                  (n) make or agree to make any new capital expenditure or
expenditures, or enter into any agreement or agreements providing for payments
which, individually, are in excess of $1,000,000 or, in the aggregate, are in
excess of $5,000,000;

                  (o) make any tax election that, individually or in the
aggregate, is reasonably likely to have a Silknet Material Adverse Effect on the
tax liability of Silknet or settle or compromise any material income tax
liability;

                  (p) pay, discharge, settle or satisfy any material claims,
liabilities, obligations or litigation (absolute, accrued, asserted or
unasserted, contingent or otherwise), other than in the ordinary course of
business and where such action would have a Silknet Material Adverse Effect; or

                  (q) take, or agree in writing or otherwise to take, any of the
actions described in Section 5.01(a) through Section 5.01(p) above.

     Section 5.02      Covenants Of Kana.

                  During the period from the date of this Agreement and
continuing until the earlier of the termination of this Agreement or the
Effective Time, Kana agrees, as to itself and its Subsidiaries, except to the
extent that Silknet shall otherwise consent in writing, to carry on its business
in the usual, regular and ordinary course in substantially the same manner as
previously conducted (it being acknowledged that the foregoing shall not limit
the ability of Kana to make or pursue corporate acquisitions) and consistent
with preserving and advancing the revenues and results of operations of Kana, to
pay its debts and taxes when due subject to good faith disputes over such debts
or taxes, to pay or perform its other obligations when due, and, to the extent
consistent with such business, use all reasonable efforts consistent with past
practices and policies to preserve intact its present business organization,
keep available the services of its present officers and key employees and
preserve its relationships with customers, suppliers, distributors, and others
having business dealings with it and except in each case where the failure to do
so would not have a Kana Material Adverse Effect. Kana shall promptly notify
Silknet of any material event or occurrence not in the ordinary course of
business of Kana. Except as expressly contemplated by this Agreement or as set
forth in Section 5.02 of the Kana Disclosure

                                       27
<PAGE>   34
Schedule, Kana shall not (and shall not permit any of its Subsidiaries to),
without the written consent of Silknet (which shall not be unreasonably withheld
or delayed):

                  (a) accelerate, amend or change the period of exercisability
of options or restricted stock granted under any employee stock plan of such
party or authorize cash payments in exchange for any options granted under any
of such plans except as required by the terms of such plans or any related
agreements in effect as of the date of this Agreement and except that the
vesting date of all options granted to employees of Kana under all options
granted under all of Kana's various stock plans may be accelerated by up to one
year by the Kana Board of Directors or an appropriate committee;

                  (b) declare or pay any dividends on or make any other
distributions (whether in cash, stock or property) in respect of any of its
capital stock, or split, combine or reclassify any of its capital stock or issue
or authorize the issuance of any other securities in respect of, in lieu of or
in substitution for shares of its capital stock, or purchase or otherwise
acquire, directly or indirectly, any shares of its capital stock except from
former employees, directors and consultants in accordance with agreements
providing for the repurchase of shares in connection with any termination of
service to such party;

                  (c) sell, lease, license or otherwise dispose of a material
amount of properties or assets, except for transactions in the ordinary course
of business;

                  (d) transfer or license to any person or entity or otherwise
extend, amend or modify in any material respect any rights to the Kana
Intellectual Property Rights other than on a non-exclusive basis in the ordinary
course of business consistent with past practices.

                  (e) enter in to or amend in any material respect any material
OEM agreement or any agreements pursuant to which any third party is granted
exclusive marketing, manufacturing or other rights with respect to any Kana
product, process or technology and where such action would have a Kana Material
Adverse Effect;

                  (f) amend or terminate any material contract, agreement or
license to which it is a party except in the ordinary course of business or
where such action would not have a Kana Material Adverse Effect;

                  (g) initiate any litigation or arbitration proceeding without
otherwise first notifying Silknet where the initiation of such proceedings, if
determined adversely, would have a Kana Material Adverse Effect;

                  (h) pay, discharge, settle or satisfy any material claims,
liabilities, obligations or litigation (absolute, accrued asserted or
unasserted, contingent or otherwise), other than in the ordinary course of
business or where such action would not have a Kana Material Adverse Effect; or

                  (i) take, or agree in writing or otherwise to take, any of the
actions described in Section 5.02(a) through Section 5.02(h) above.

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<PAGE>   35
     Section 5.03      Cooperation.

                  Subject to compliance with applicable law, from the date
hereof until the Effective Time, each of Kana and Silknet shall confer on a
regular and frequent basis with one or more representatives of the other party
to report on the general status of ongoing operations and shall promptly provide
the other party or its counsel with copies of all filings made by such party
with any Governmental Entity in connection with this Agreement, the Merger and
the transactions contemplated hereby and thereby.

     Section 5.04      Advice of Changes.

                  Silknet and Kana shall promptly advise the other party orally
and in writing to the extent it has knowledge of (i) any representation or
warranty made by it (and, in the case of Kana, made by Sub) contained in this
Agreement or the Stock Option Agreements becoming untrue or inaccurate in any
respect where the failure of such representation to be so true and correct
(without giving effect to any limitation as to "materiality" or "material
adverse effect" set forth therein), individually or in the aggregate, has had or
is reasonably likely to have a material adverse effect on it, (ii) the failure
by it (and, in the case of Kana, by Sub) to comply in any material respect with
or satisfy in any material respect any covenant, condition or agreement to be
complied with or satisfied by it under this Agreement or the Stock Option
Agreements and (iii) any change or event having, or which is reasonably likely
to have, a material adverse effect on such party or on the truth of their
respective representations and warranties or the ability of the conditions set
forth in Article VII to be satisfied; provided, however, that no such
notification shall affect the representations, warranties, covenants or
agreements of the parties (or remedies with respect thereto) or the conditions
to the obligations of the parties under this Agreement or the Stock Option
Agreements.

                                  ARTICLE VI.

                              ADDITIONAL AGREEMENTS

     Section 6.01      Proxy Statement/Prospectus; Registration Statement.

                  As promptly as reasonably practicable after the execution of
this Agreement, Silknet and Kana will prepare, and file with the SEC, the Joint
Proxy Statement/Prospectus, and Kana will prepare and file with the SEC the
Registration Statement, in which the Joint Proxy Statement/Prospectus will be
included as a prospectus. Each of Kana and Silknet shall provide promptly to the
other such information concerning its business and financial statements and
affairs as, in the reasonable judgment of the providing party or its counsel,
may be required or appropriate for inclusion in the Joint Proxy
Statement/Prospectus and the Registration Statement, or in any amendments or
supplements thereto, and to cause its counsel and auditors to cooperate with the
other's counsel and auditors in the preparation of the Joint Proxy
Statement/Prospectus and the Registration Statement. Each of Silknet and Kana
will respond to any comments of the SEC, and will use its respective
commercially reasonable efforts to have the Registration Statement declared
effective under the Securities Act as promptly as practicable after such filing,
and Silknet will cause the Joint Proxy Statement/Prospectus to be mailed to its
stockholders at

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<PAGE>   36
the earliest practicable time after the Registration Statement is declared
effective by the SEC (the "SEC Effective Date"). As promptly as practicable
after the date of this Agreement, each of Silknet and Kana will prepare and file
any other filings required to be filed by it under the Exchange Act, the
Securities Act or any other federal, foreign or Blue Sky or related securities
laws in order to consummate the Merger and the transactions contemplated by this
Agreement (the "Other Filings"). Each of Silknet and Kana will notify the other
promptly upon the receipt of any comments from the SEC or its staff and of any
request by the SEC or its staff for amendments or supplements to the
Registration Statement or the Joint Proxy Statement/Prospectus and will supply
the other with copies of all correspondence between such party or any of its
representatives, on the one hand, and the SEC or its staff, on the other hand,
with respect to the Registration Statement, the Joint Proxy Statement/Prospectus
or the Merger. Each of Silknet and Kana will cause all documents that it is
responsible for filing with the SEC under this Section 6.01 to comply in all
material respects with all applicable requirements of law and the rules and
regulations promulgated thereunder. Whenever any event occurs which is required
to be set forth in an amendment or supplement to the Joint Proxy
Statement/Prospectus or the Registration Statement, Silknet or Kana, as the case
may be, will promptly inform the other of such occurrence and cooperate in
filing with the SEC or its staff, and/or mailing to stockholders of Silknet,
such amendment or supplement. Notwithstanding any other provision of this
Agreement, nothing herein shall required Kana to qualify to do business in any
jurisdiction in which it is not now so qualified or to file a general consent to
service of process under any applicable state securities laws in connection with
the issuance of Kana Common Stock in the Merger.

     Section 6.02      No Solicitation by Silknet.

                  (a) Until the earlier of the Effective Time or a valid
termination of this Agreement pursuant to Article VIII, Silknet will not, and
will not authorize, direct or permit any of its officers, directors, employees,
affiliates under the control of Silknet, investment bankers, attorneys,
accountants or other agents, advisors or representatives (collectively,
"Representatives") to, directly or indirectly, (i) solicit, initiate, encourage
or induce the making, submission or announcement of any Silknet Takeover
Proposal (as defined below), (ii) participate in any discussions or negotiations
with any person regarding, or furnish to any person any information with respect
to, or take any other action to facilitate any inquiry or proposal that
constitutes or may reasonably be expected to lead to, any Silknet Takeover
Proposal, (iii) authorize, approve or recommend any Silknet Takeover Proposal,
or (iv) enter into any letter of intent or similar document or any contract,
agreement or commitment accepting or providing for any Silknet Takeover
Proposal; provided, however, nothing herein shall prohibit Silknet's Board of
Directors from complying with Rules 14d-9 and 14e-2 under the Exchange Act; and
provided, further, however, that this Section 6.02(a) shall not prohibit
Silknet, before the adoption of this Agreement by the stockholders of Silknet,
from furnishing information regarding Silknet or entering into negotiations or
discussions with, any person or group in response to a Silknet Takeover Proposal
submitted by such person or group (and not withdrawn) and, subject to the
provisions of Section 6.06 of this Agreement, endorsing and/or recommending a
Silknet Superior Offer (as defined below), and any such actions shall not be
considered a breach of this Agreement to the extent they are taken in compliance
with the conditions and limitations set forth in this Agreement if (1) neither
Silknet nor any of its Representatives shall have violated any of the
restrictions set forth in this Section 6.02(a) or Section 6.06, (2) the Board of
Directors

                                       30
<PAGE>   37
of Silknet determines in good faith, after considering the advice of an
investment bank of nationally recognized reputation, that such Silknet Takeover
Proposal is substantially more favorable to Silknet and its stockholders than
the Merger, taking into account the anticipated long-term strategic benefits of
the Merger to Silknet stockholders, (3) the Board of Directors of Silknet
concludes in good faith, after consultation with its outside legal counsel, that
failure to take such action would be inconsistent with the fiduciary obligations
of the Board of Directors of Silknet to Silknet stockholders under applicable
law, (4) prior to furnishing any such information to, or entering into
discussions or negotiations with, such person or group, Silknet gives Kana
written notice of the identity of such person or group, the terms and conditions
of the offer and Silknet's intention to furnish information to, or enter into
discussions or negotiations with, such person or group, (5) Silknet receives
from such person or group an executed confidentiality agreement which shall not
in any way restrict Silknet from complying with its disclosure obligations under
this Agreement and which shall contain customary limitations on the use and
disclosure of all nonpublic written and oral information furnished to such
person or group by or on behalf of Silknet and other terms no less favorable to
Silknet than those set forth in the Confidentiality Agreement (as hereinafter
defined), and (6) contemporaneously with furnishing any such information to such
person or group, Silknet furnishes such information to Kana (to the extent that
such information has not been previously furnished by Silknet to Kana).

                  (b) Silknet and its Representatives will immediately cease and
cause to be terminated any and all existing discussions, negotiations, exchanges
of information and other activities with respect to any Silknet Takeover
Proposal. Promptly following the execution and delivery of this Agreement,
Silknet shall (i) inform each of its Representatives of the obligations
undertaken in this Section 6.02 and in the Confidentiality Agreement and (ii)
request each person that has heretofore executed a confidentiality or
non-disclosure agreement in connection with its consideration of acquiring it or
any of its Subsidiaries to return to Silknet all confidential information
heretofore furnished to such person by or on behalf of it or any of its
Subsidiaries. At the Closing, Silknet shall assign to Kana the non-exclusive
right to enforce the rights of Silknet and its Subsidiaries under any and all
such confidentiality or non-disclosure agreements. Any violation of the
restrictions set forth in this Section 6.02 by any officer, director or employee
of Silknet, any affiliate under the control of Silknet, or any investment
banker, attorney, accountant or other agent, advisor or representative of
Silknet shall be deemed to be a breach of this Section 6.02 by Silknet. Silknet
shall notify Kana forthwith if any inquiries, proposals or offers relating to a
Silknet Takeover Proposal are received by, any such information is requested
from, or any such discussions or negotiations are sought to be initiated or
continued with, Silknet or any of its Representatives, indicating, in connection
with such notice, the name of the person making the inquiry, proposal or offer
and the material terms and conditions of any proposals or offers. Thereafter
Silknet shall provide Kana with a true and complete copy of such Silknet
Takeover Proposal or communication (if it is in writing) and shall otherwise
keep Kana informed, on a current basis, with respect to the status and terms of
any such proposal or offer and the status of any such negotiations or
discussions.

                  (c) Silknet and Kana agree that irreparable damage would occur
in the event that the provisions of this Section 6.02 were not performed in
accordance with their specific terms or were otherwise breached. It is
accordingly agreed by the parties hereto that Kana shall be entitled to seek an
injunction or injunctions to prevent breaches of this Section 6.02 and to
enforce specifically the terms and provisions hereof in any court of the United
States or any state

                                       31
<PAGE>   38
having jurisdiction, this being in addition to any other remedy to which the
parties may be entitled at law or in equity.

                  (d) For purposes of this Agreement, "Silknet Takeover
Proposal" means any offer or proposal for, or any indication of interest in, a
merger or other business combination involving Silknet or the acquisition of
twenty percent (20%) or more of the outstanding shares of capital stock of
Silknet, or all or substantially all of the assets of Silknet or any asset of
Silknet, the absence of which would materially diminish the value of the Merger
to Kana or the benefits expected by Kana to be realized from the Merger (other
than the transactions contemplated by this Agreement), or any other transaction
inconsistent with consummation of the transactions contemplated hereby.

     Section 6.03      No Solicitation by Kana.

                  (a) Until the earlier of the Effective Time or a valid
termination of this Agreement pursuant to Article VIII, Kana will not, and will
not authorize, direct or permit any of its Representatives to, directly or
indirectly, (i) solicit, initiate, encourage or induce the making, submission or
announcement of any Kana Takeover Proposal (as defined below), (ii) participate
in any discussions or negotiations with any person regarding, or furnish to any
person any information with respect to, or take any other action to facilitate
any inquiry or proposal that constitutes or may reasonably be expected to lead
to, any Kana Takeover Proposal, (iii) authorize, approve or recommend any Kana
Takeover Proposal, or (iv) enter into any letter of intent or similar document
or any contract, agreement or commitment accepting or providing for any Kana
Takeover Proposal; provided, however, nothing herein shall prohibit Kana's Board
of Directors from complying with Rules 14d-9 and 14e-2 under the Exchange Act;
and provided, further, however, that this Section 6.03(a) shall not prohibit
Kana, before the approval by Kana stockholders of the issuance of Kana Common
Stock pursuant to this Agreement (the "Kana Voting Proposal"), from furnishing
information regarding Kana or entering into negotiations or discussions with,
any person or group in response to a Kana Takeover Proposal submitted by such
person or group (and not withdrawn) and, subject to the provisions of Section
6.06 of this Agreement, endorsing and/or recommending a Kana Superior Offer (as
defined below), and any such actions shall not be considered a breach of this
Agreement to the extent they are taken in compliance with the conditions and
limitations set forth in this Agreement if (1) neither Kana nor any of its
Representatives shall have violated any of the restrictions set forth in this
Section 6.03(a) or Section 6.06, (2) the Board of Directors of Kana determines
in good faith, after considering the advice of an investment bank of nationally
recognized reputation, that such Kana Takeover Proposal is substantially more
favorable to Kana and its stockholders than the Merger, taking into account the
anticipated long-term value and strategic benefits of the Merger to Kana
stockholders, (3) the Board of Directors of Kana concludes in good faith, after
consultation with its outside legal counsel, that failure to take such action
would be inconsistent with the fiduciary obligations of the Board of Directors
of Kana to Kana stockholders under applicable law, (4) prior to furnishing any
such information to, or entering into discussions or negotiations with, such
person or group, Kana gives Silknet written notice of the identity of such
person or group, the terms and conditions of the offer and Kana's intention to
furnish information to, or enter into discussions or negotiations with, such
person or group, (5) Kana receives from such person or group an executed
confidentiality agreement which shall not in any way restrict Kana from
complying with its disclosure obligations under this Agreement and which shall
otherwise

                                       32
<PAGE>   39
contain customary limitations on the use and disclosure of all nonpublic written
and oral information furnished to such person or group by or on behalf of Kana
and other terms no less favorable to Kana than those set forth in the
Confidentiality Agreement, including with respect to such Kana Takeover
Proposal), and (6) contemporaneously with furnishing any such information to
such person or group, Kana furnishes such information to Silknet (to the extent
that such information has not been previously furnished by Kana to Silknet).

                  (b) Kana and its Representatives will immediately cease and
cause to be terminated any and all existing discussions, negotiations, exchanges
of information and other activities with respect to any Kana Takeover Proposal.
Promptly following the execution and delivery of this Agreement, Kana shall (i)
inform each of its Representatives of the obligations undertaken in this Section
6.03 and in the Confidentiality Agreement, and (ii) request each person that has
heretofore executed a confidentiality or non-disclosure agreement in connection
with its consideration of acquiring it or any of its Subsidiaries to return to
Kana all confidential information heretofore furnished to such person by or on
behalf of it or any of its Subsidiaries. Any violation of the restrictions set
forth in this Section 6.03 by any officer, director or employee of Kana, any
affiliate under the control of Kana, or any investment banker, attorney,
accountant or other agent, advisor or representative of Kana shall be deemed to
be a breach of this Section 6.03 by Kana. Kana shall notify Silknet forthwith if
any inquiries, proposals or offers relating to a Kana Takeover Proposal are
received by, any such information is requested from, or any such discussions or
negotiations are sought to be initiated or continued with, Kana or any of its
Representatives, indicating, in connection with such notice, the name of the
person making the inquiry, proposal or offer and the material terms and
conditions of any proposals or offers. Thereafter Kana shall provide Silknet
with a true and complete copy of such Kana Takeover Proposal or communication
(if it is in writing) and shall otherwise keep Silknet informed, on a current
basis, with respect to the status and terms of any such proposal or offer and
the status of any such negotiations or discussions.

                  (c) Kana and Silknet agree that irreparable damage would occur
in the event that the provisions of this Section 6.03 were not performed in
accordance with their specific terms or were otherwise breached. It is
accordingly agreed by the parties hereto that Silknet shall be entitled to seek
an injunction or injunctions to prevent breaches of this Section 6.03 and to
enforce specifically the terms and provisions hereof in any court of the United
States or any state having jurisdiction, this being in addition to any other
remedy to which the parties may be entitled at law or in equity.

                  (d) For purposes of this Agreement, "Kana Takeover Proposal"
means any offer or proposal for, or any indication of interest in, a merger or
other business combination involving an acquisition or a change in control of
Kana or the acquisition of a majority of the outstanding shares of capital stock
of Kana, or all or substantially all of the assets of Kana, or any other
transaction inconsistent with consummation of the transactions contemplated
hereby, which offer, proposal or indication of interest is conditioned on the
termination of this Agreement by Kana or the denial by Kana stockholders of the
Kana Voting Proposal.

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<PAGE>   40
     Section 6.04      Nasdaq.

                  Each of Silknet and Kana agrees to continue the quotation of
Kana Common Stock and Silknet Common Stock, respectively, on the Nasdaq National
Market, during the term of this Agreement so that appraisal rights will not be
available to stockholders of Silknet under Section 262 of the DGCL.

     Section 6.05      Access To Information.

                  Upon reasonable notice, Silknet and Kana shall each (and shall
cause each of their respective Subsidiaries to) afford to the officers,
employees, accountants, counsel and other representatives of the other, access,
during normal business hours during the period prior to the Effective Time, to
all its properties, books, contracts, commitments and records and, during such
period, each of Silknet and Kana shall (and shall cause each of their respective
Subsidiaries to) furnish promptly to the other (a) a copy of each report,
schedule, registration statement and other document filed or received by it
during such period pursuant to the requirements of federal securities laws and
(b) all other information concerning its business, properties and personnel as
such other party may reasonably request. Unless otherwise required by law, the
parties will hold any such information which is nonpublic in confidence in
accordance with the Confidentiality Agreement. No information or knowledge
obtained in any investigation pursuant to this Section 6.05 shall affect or be
deemed to modify any representation or warranty contained in this Agreement or
the conditions to the obligations of the parties to consummate the Merger.

     Section 6.06      Stockholders Meetings.

                  (a) Promptly after the date hereof, Silknet will take all
action reasonably necessary in accordance with the DGCL and its Certificate of
Incorporation and by-laws to cause the Silknet Stockholders' Meeting to be held
as promptly as practicable for the purpose of voting upon this Agreement and the
Merger, and Kana will take all action reasonably necessary in accordance with
the DGCL and its Certificate of Incorporation and by-laws to cause the Kana
Stockholders' Meeting to be held as promptly as practicable for the purpose of
voting upon the Kana Voting Proposal. Unless otherwise mutually agreed by Kana
and Silknet, Kana and Silknet shall coordinate and cooperate with respect to the
timing of such meetings and shall use their reasonable best efforts to hold such
meetings on the same day and as soon as practicable after the date hereof.
Subject to their rights under Section 8.01(i) and Section 8.01(j), Silknet and
Kana shall solicit from their respective stockholders proxies in favor of the
approval and adoption of this Agreement and approval of the Merger (in the case
of Silknet stockholders) and the Kana Voting Proposal (in the case of Kana
stockholders), and will take all other action necessary or advisable to secure
the vote or consent of their respective stockholders required by the rules of
Nasdaq or the DGCL to obtain such approvals; provided, however, that neither
Silknet nor Kana shall be required to take any action that its respective Board
of Directors determines in good faith after consultation with outside legal
counsel would be inconsistent with its fiduciary duties to its stockholders
under applicable law. Notwithstanding anything to the contrary contained in this
Agreement, Silknet may adjourn or postpone the Silknet Stockholders' Meeting,
and Kana may adjourn or postpone the Kana Stockholders' Meeting, to the extent
that (i) such adjournment or postponement is necessary to ensure that any
necessary supplement or amendment to the Prospectus/Proxy Statement is provided
to such party's stockholders in advance of the applicable

                                       34
<PAGE>   41
vote or (ii) additional time is reasonably required to solicit proxies in favor
of the approvals required by Section 7.01(a) or (iii) as of the time for which
such stockholders' meeting is originally scheduled (as set forth in the
Prospectus/Proxy Statement) there are insufficient shares represented (either in
person or by proxy) to constitute a quorum necessary to conduct the business of
such stockholders' meeting. Silknet shall ensure that Silknet Stockholders'
Meeting is called, noticed, convened, held and conducted, and that all proxies
solicited by Silknet in connection with Silknet Stockholders' Meeting are
solicited, and Kana shall ensure that Kana Stockholders' Meeting is called,
noticed, convened, held and conducted, and that all proxies solicited by Kana in
connection with Kana Stockholders' Meeting are solicited, in compliance with the
DGCL, applicable charter documents, the rules of Nasdaq and all other applicable
legal requirements.

                  (b) (i) The Board of Directors of Silknet shall recommend that
Silknet stockholders vote in favor of the approval and adoption of this
Agreement and approval of the Merger at the Silknet Stockholders' Meeting; (ii)
the Prospectus/Proxy Statement shall include a statement to the effect that the
Board of Directors of Silknet has recommended that Silknet stockholders vote in
favor of the approval and adoption of this Agreement and approval of the Merger
at Silknet Stockholders' Meeting; and (iii) neither the Board of Directors of
Silknet nor any committee thereof shall withdraw, amend or modify, or propose or
resolve to withdraw, amend or modify in a manner adverse to Kana the
recommendation of the Board of Directors of Silknet that Silknet stockholders
vote in favor of the approval and adoption of this Agreement and approval of the
Merger; provided, however, that nothing in this Agreement shall prevent the
Board of Directors of Silknet from withholding, withdrawing, amending or
modifying its recommendation in favor of approval and adoption of this Agreement
and approval of the Merger if: (A) a Silknet Superior Offer is made to Silknet
and is not withdrawn, (B) neither Silknet nor any of its representatives shall
have violated any of the restrictions set forth in Section 6.02, (C) five
business days elapse following delivery by Silknet to Kana of written notice
advising Kana that the Board of Directors of Silknet intends to withhold,
withdraw, amend or modify its recommendation; and (D) the Board of Directors of
Silknet concludes in good faith, after considering applicable state law and
consultation with its outside counsel, that, in light of such Silknet Superior
Offer, the failure to withhold, withdraw, amend or modify such recommendation
would be inconsistent with the fiduciary duties of the Board of Directors of
Silknet to Silknet stockholders under applicable law. For purposes of this
Agreement, "Silknet Superior Offer" shall mean an unsolicited, bona fide written
offer made by a third party to consummate any of the following transactions: (x)
a merger, consolidation, business combination, recapitalization, liquidation,
dissolution or similar transaction involving Silknet pursuant to which the
stockholders of Silknet immediately preceding such transaction hold less than
fifty percent (50%) of the equity interest in the surviving or resulting entity
of such transaction; (y) a sale or other disposition by Silknet of assets
(excluding inventory and used equipment sold in the ordinary course of business)
representing all or substantially all of Silknet's assets, or (z) the
acquisition by any person or group (including by way of a tender offer or an
exchange offer or issuance by Silknet), directly or indirectly, of beneficial
ownership or a right to acquire beneficial ownership of shares representing
fifty percent (50%) or more of the voting power of the then outstanding shares
of capital stock of Silknet, in each case on terms that, in the good faith
judgment of the Board of Directors of Silknet (after consultation with an
investment bank of nationally recognized reputation) are substantially more
favorable to Silknet stockholders than the Merger (after taking into account all
relevant factors, including the

                                       35
<PAGE>   42
anticipated long-term value and strategic benefits of the Merger to Silknet
stockholders, any conditions to the Silknet Superior Offer, the timing of the
consummation of the transaction pursuant to the Silknet Superior Offer, the risk
of nonconsummation thereof and the need for any required governmental or other
consents, filings and approvals); provided, however, that an offer shall only be
a Silknet Superior Offer if any financing required to consummate the transaction
contemplated by such offer is committed or is otherwise reasonably likely in the
good faith judgment of Silknet's Board of Directors to be obtained by such third
party on a timely basis.

                  (c) Subject to the right of Silknet to terminate this
Agreement pursuant to Section 8.01(i), nothing contained in Section 6.06(b)
shall limit Silknet's obligation to call, give notice of, convene and hold the
Silknet Stockholders' Meeting (regardless of whether the recommendation of the
Board of Directors of Silknet shall have been withdrawn, amended or modified and
regardless of whether any Silknet Takeover Proposal has been commenced,
disclosed, or announced).

                  (d) (i) The Board of Directors of Kana shall recommend that
Kana stockholders vote in favor of approval of the Kana Voting Proposal at the
Kana Stockholders' Meeting; (ii) the Prospectus/Proxy Statement shall include a
statement to the effect that the Board of Directors of Kana has recommended that
Kana stockholders vote in favor approval of the Kana Voting Proposal pursuant to
this Agreement at the Kana Stockholders' Meeting; and (iii) neither the Board of
Directors of Kana nor any committee thereof shall withdraw, amend or modify, or
propose or resolve to withdraw, amend or modify in a manner adverse to Silknet
the recommendation of the Board of Directors of Kana that Kana stockholders vote
in favor approval of the Kana Voting Proposal pursuant to this Agreement;
provided, however, that nothing in this Agreement shall prevent the Board of
Directors of Kana from withholding, withdrawing, amending or modifying its
recommendation in favor of approval and adoption of this Agreement and approval
of the Merger if (A) a Kana Superior Offer is made to Kana and is not withdrawn,
(B) neither Kana nor any of its representatives shall have violated any of the
restrictions set forth in Section 6.03, (C) five business days elapse following
delivery by Kana to Silknet of written notice advising Silknet that the Board of
Directors of Kana intends to withhold, withdraw, amend or modify its
recommendation absent modification of the terms and conditions of this
Agreement, and (D) the Board of Directors of Kana concludes in good faith, after
considering applicable state law and consultation with its outside counsel,
that, in light of such Kana Superior Offer, the failure to withhold, withdraw,
amend or modify such recommendation would be inconsistent with the fiduciary
duties of the Board of Directors of Kana to Kana stockholders under applicable
law. For purposes of this Agreement, "Kana Superior Offer" shall mean an
unsolicited, bona fide written offer made by a third party to consummate any of
the following transactions: (x) a merger, consolidation, business combination,
recapitalization, liquidation, dissolution or similar transaction involving Kana
pursuant to which the stockholders of Kana immediately preceding such
transaction hold less than fifty percent (50%) of the equity interest in the
surviving or resulting entity of such transaction; (y) a sale or other
disposition by Kana of assets (excluding inventory and used equipment sold in
the ordinary course of business) representing all or substantially all of Kana's
assets, or (z) the acquisition by any person or group (including by way of a
tender offer or an exchange offer or issuance by Kana), directly or indirectly,
of beneficial ownership or a right to acquire beneficial ownership of shares
representing fifty percent (50%) or more of the voting power of the then
outstanding shares of capital stock of Kana, in each case on terms that, in the
good faith judgment of the Board of

                                       36
<PAGE>   43
Directors of Kana (after consultation with an investment bank of nationally
recognized reputation) are substantially more favorable to Kana or its
stockholders than the Merger (after taking into account all relevant factors,
including the anticipated long-term value and strategic benefits of the Merger
to Kana and its stockholders, any conditions to the Kana Superior Offer, the
timing of the consummation of the transaction pursuant to the Kana Superior
Offer, the risk of nonconsummation thereof and the need for any required
governmental or other consents, filings and approvals); provided, however, that
an offer shall only be a Kana Superior Offer if any financing required to
consummate the transaction contemplated by such offer is committed or is
otherwise reasonably likely in the good faith judgment of Kana's Board of
Directors to be obtained by such third party on a timely basis.

                  (e) Subject to the right of Kana to terminate this Agreement
pursuant to Section 8.01(j), nothing contained in Section 6.06(d) shall limit
Kana's obligation to call, give notice of, convene and hold the Kana
Stockholders' Meeting (regardless of whether the recommendation of the Board of
Directors of Kana shall have been withdrawn, amended or modified and regardless
of whether any Kana Takeover Proposal has been commenced, disclosed, or
announced).

                  (f) Kana may also submit additional proposals to its
stockholders at the Kana Stockholders' Meeting (including a proposal to amend
its Certificate of Incorporation to increase the number of authorized shares of
Kana Common Stock or amend its Stock Incentive Plan to increase the number of
Kana Common Stock issuable thereunder) that are not inconsistent with Kana's
obligations under this Agreement, separate from the proposal referred to in
Section 3.20. The approval by Kana stockholders of such additional proposals
shall not be a condition to the closing of the Merger under this Agreement.

     Section 6.07      Legal Conditions To Merger.

                  (a) Silknet and Kana shall each use all requisite commercially
reasonable efforts to (i) take, or cause to be taken, all appropriate action,
and do, or cause to be done, all things necessary and proper under applicable
law to consummate and make effective the transactions contemplated hereby as
promptly as practicable, (ii) obtain from any Governmental Entity or any other
third party any consents, licenses, permits, waivers, approvals, authorizations,
or orders required to be obtained or made by Silknet or Kana or any of their
Subsidiaries in connection with the authorization, execution and delivery of
this Agreement and the consummation of the transactions contemplated hereby
including the Merger, and (iii) as promptly as practicable, make all necessary
filings, and thereafter make any other required submissions, with respect to
this Agreement and the Merger required under (A) the Securities Act and the
Exchange Act, and any other applicable federal or state securities laws, and (B)
any other applicable law. Silknet and Kana shall cooperate with each other in
connection with the making of all such filings, including providing copies of
all such documents to the non-filing party and its advisors prior to filing and,
if requested, to accept all reasonable additions, deletions or changes suggested
in connection therewith. Silknet and Kana shall use commercially reasonable
efforts to furnish to each other all information required for any application or
other filing to be made pursuant to the rules and regulations of any applicable
law (including all information required to be included in the Joint Proxy
Statement/Prospectus and the Registration Statement) in connection with the
transactions contemplated by this Agreement.

                                       37
<PAGE>   44
                  (b) Kana and Silknet agree, and shall cause each of their
respective Subsidiaries, to cooperate and to use their respective commercially
reasonable efforts to obtain any government clearances required for Closing, to
respond to any government requests for information, and to contest and resist
any action, including any legislative, administrative or judicial action, and to
have vacated, lifted, reversed or overturned any decree, judgment, injunction or
other order (whether temporary, preliminary or permanent) (an "Order") that
restricts, prevents or prohibits the consummation of the Merger or any other
transactions contemplated by this Agreement, including by vigorously pursuing
all available avenues of administrative and judicial appeal and all available
legislative action.

                  (c) Each of Silknet and Kana shall give (or shall cause their
respective Subsidiaries to give) any notices to third parties, and use, and
cause their respective Subsidiaries to use, commercially reasonable efforts to
obtain any third party consents related to or required in connection with the
Merger that are (i) necessary to consummate the transactions contemplated
hereby, (ii) disclosed or required to be disclosed in the Silknet Disclosure
Schedule or the Kana Disclosure Schedule, as the case may be, or (iii) required
to prevent a Silknet Material Adverse Effect or a Kana Material Adverse Effect
from occurring.

     Section 6.08      Public Disclosure.

                  Kana and Silknet shall consult with each other before issuing
any press release or otherwise making any public statement with respect to the
Merger or this Agreement and shall not issue any such press release or make any
such public statement prior to such consultation, except as may be required by
law.

     Section 6.09      Tax-Free Reorganization.

                  Kana and Silknet shall each use all requisite commercially
reasonable efforts to cause the Merger to be treated as a reorganization within
the meaning of Section 368(a) of the Internal Revenue Code.

     Section 6.10      Nasdaq Quotation.

                  Kana shall use all requisite commercially reasonable efforts
to cause the shares of Kana Common Stock to be issued in the Merger to be
approved for quotation on the Nasdaq National Market, subject to official notice
of issuance, prior to the Closing Date.

     Section 6.11      Stock Plans and Warrants.

                  (a) At the Effective Time, each outstanding option to purchase
shares of Silknet Common Stock (a "Silknet Stock Option") under the Silknet
Stock Plans, whether vested or unvested, shall be assumed and shall constitute
an option to acquire, on the same terms and conditions as were applicable under
such Silknet Stock Option, the same number of shares of Kana Common Stock as the
holder of such Silknet Stock Option would have been entitled to receive pursuant
to the Merger had such holder exercised such option in full immediately prior to
the Effective Time (rounded downward to the nearest whole number), at a price
per share (rounded upward to the nearest whole cent) equal to (y) the aggregate
exercise price for the shares of Silknet Common Stock purchasable pursuant to
such Silknet Stock Option immediately

                                       38
<PAGE>   45
prior to the Effective Time divided by (z) the number of full shares of Kana
Common Stock deemed purchasable pursuant to such Silknet Stock Option in
accordance with the foregoing. All outstanding rights of Silknet that it may
hold immediately prior to the Effective Time to repurchase unvested shares of
Silknet Common Stock issued or issuable under any of the Silknet Stock Plans
(the "Repurchase Options") shall be assigned to Kana and shall thereafter be
exercisable by Kana upon the same terms and conditions in effect immediately
prior to the Effective Time, except that the shares purchasable pursuant to the
Repurchase Options and the purchase price per shall be adjusted to reflect the
Exchange Ratio.

                  (b) As soon as practicable after the Effective Time, Kana
shall deliver to the participants in Silknet Stock Plans appropriate notice
setting forth such participants' rights pursuant thereto and the grants pursuant
to Silknet Stock Plans shall continue in effect on the same terms and conditions
(subject to the adjustments required by this Section 6.11 after giving effect to
the Merger). Consistent with the terms of the Silknet Stock Plans and the
documents governing the outstanding options under those plans, the Merger shall
not result in the termination of any outstanding options under the Silknet Stock
Plans that are so assumed by Kana or the shares of Kana Common Stock that will
be subject to those options upon Kana's assumption of the options in the Merger.
All holders of Silknet stock options shall have the right to exercise such
options following the Effective Time, with full credit given to all of the
provisions of the existing stock option agreements and the Silknet stock option
plans, including provisions regarding vesting and service relating to any
predecessor corporation acquired by Silknet and including the vesting
acceleration provisions pursuant to which twenty-five percent (25%) of the
unvested option share vest) upon a change in control such as the Merger. It is
the intention of the parties that the options so assumed by Kana qualify
following the Effective Time as incentive stock options as defined in Section
422 of the Code to the extent such options qualified as incentive stock options
prior to the Effective Time. Within 30 business days after the Effective Time,
provided that Kana has received within 10 business days after the Effective Time
all option documentation it requires relating to the outstanding options, Kana
will issue to each person who, immediately prior to the Effective Time, is a
holder of an outstanding option under the Silknet stock option plans that is to
be assumed by Kana hereunder, a document in form and substance reasonably
satisfactory to Silknet evidencing the foregoing assumption of such option by
Kana, including provisions regarding vesting and service relating to any
predecessor corporation acquired by Silknet and its subsidiaries and including
the vesting acceleration provisions pursuant to which twenty-five percent (25%)
of the unvested option share vest at the time of a change in control such as the
Merger.

                  (c) Kana shall take all corporate action necessary to reserve
for issuance a sufficient number of shares of Kana Common Stock for delivery
under Silknet Stock Plans assumed in accordance with this Section 6.11. As soon
as practicable and in no event more than thirty (30) business days after the
Effective Time, provided that Kana has received within 10 business days after
the Effective Time all option documentation it requires relating to the
outstanding options, Kana shall file a registration statement on Form S-8 (or
any successor forms), subject to such options and shall use commercially
reasonable efforts to maintain the effectiveness of such registration statement
or registration statements (and maintain the current status of the prospectus or
prospectuses contained therein) for so long as such options remain outstanding.
Silknet shall cooperate with and assist Kana in the preparation of such
registration statements.

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<PAGE>   46
                  (d) The Board of Directors of Silknet shall, prior to or as of
the Effective Time, take all necessary actions, pursuant to and in accordance
with the terms of the Silknet Stock Plans and the instruments evidencing the
Silknet Stock Options, to provide for the conversion of the Silknet Stock
Options into options to acquire Kana Common Stock in accordance with this
Section 6.11, and that no consent of the holders of the Silknet Stock Options is
required in connection with such conversion.

                  (e) The Board of Directors of Silknet shall, prior to or as of
the Effective Time, take appropriate action to approve the deemed cancellation
of the Silknet Stock Options for purposes of Section 16(b) of the Exchange Act.
The Board of Directors of Kana shall, prior to or as of the Effective Time, take
appropriate action to approve the deemed grant of options to purchase Kana
Common Stock under the Silknet Stock Options (as converted pursuant to this
Section 6.11) for purposes of Section 16(b) of the Exchange Act.

                  (f) Effective as of the date that is two business days prior
to the Closing Date, Silknet shall take, or cause to be taken, all action
necessary to amend the Silknet ESPP to (a) provide that the Silknet ESPP, and
all future payment periods thereunder, shall terminate on the business day
immediately prior to the first semi-annual entry date under the Kana Employee
Stock Purchase Plan that is at least 30 business days following the Effective
Time (the "Kana Entry Date"), and (b) any purchase rights that are outstanding
on the business day immediately prior to the Kana Entry Date shall be exercised
immediately prior to the Plan termination. Outstanding purchase rights under the
Silknet ESPP shall be assumed by Kana at the Effective Time. On the Closing
Date, Silknet shall deliver to Kana a complete list of all holders of
outstanding purchase rights under the Silknet ESPP, including payroll deduction
amounts elected by each holder and the price per share of Silknet Common Stock
at the beginning of the current Silknet ESPP payment period. Each such purchase
right so assumed by Kana under this Agreement shall continue to have, and be
subject to, the same terms and conditions set forth in the Silknet ESPP and the
documents governing the outstanding purchase rights under the Silknet ESPP,
immediately prior to the Effective Time, except that the purchase price of
shares of Kana Common Stock and the number of shares of Kana Common Stock to be
issued upon the exercise of the assumed purchase right under the Silknet ESPP
shall be adjusted in accordance with the Exchange Ratio. On the date the assumed
purchase rights under the Silknet ESPP are exercised in accordance with the
foregoing, each participant in the Silknet ESPP shall accordingly be issued
shares of Kana Common Stock upon such purchase (adjusted for the Exchange
Ratio). The Silknet ESPP, and all outstanding purchase rights thereunder, shall
terminate with such purchase date, and no purchase rights shall be subsequently
granted or exercised under the Silknet ESPP. Silknet employees who meet the
eligibility requirements for participation in the Kana Employee Stock Purchase
Plan (giving credit for service to Silknet for purposes of determining
eligibility) shall be eligible to begin payroll deductions under that plan as of
the first semi-annual entry date thereunder after the Effective Time.

                  (g) Within five (5) business days following the date of this
Agreement, Silknet shall set forth on Schedule 6.11(g) a list of all persons who
Silknet reasonably believes are, with respect to Silknet and as of the date of
this Agreement, "disqualified individuals" (within the meaning of Section 280G
of the Code and the regulations promulgated thereunder). Within five (5)
business days prior to the Closing Date, Silknet shall revise Schedule 6.11(g)
to

                                       40
<PAGE>   47
reflect any additional information that Silknet reasonably believes would impact
the determination of persons who are, with respect to Silknet, such
"disqualified individuals."

                  (h) At the Effective Time, Kana shall assume all outstanding
warrants to exercise Silknet Common Stock ("Silknet Warrants") which have not
expired or been exercised prior thereto. Each Silknet Warrant so assumed by Kana
under this Agreement shall continue to have, and be subject to, the same terms
and conditions as were applicable to such Silknet Warrant immediately prior to
the Effective Time (including, without limitation, any repurchase rights or
vesting provisions), provided that (A) such Silknet Warrant shall be exercisable
for that number of whole shares of Kana Common Stock equal to the product of the
number of shares of Silknet Common Stock that were issuable upon exercise of
such Silknet Warrant immediately prior to the Effective Time multiplied by the
Exchange Ratio applicable to the Silknet Common Stock subject to such Silknet
Warrant (rounded down to the nearest whole number of shares of Kana Common
Stock) and (B) the per share exercise price for the shares of Kana Common Stock
issuable upon exercise of such assumed Silknet Warrant shall be equal to the
quotient determined by dividing the exercise price per share of Silknet Common
Stock at which such Silknet Warrant was exercisable immediately prior to the
Effective Time by the Exchange Ratio applicable to the series of Silknet Common
Stock subject to such Silknet Warrant (rounded up to the nearest whole cent).
Kana shall, from and after the Effective Time, upon exercise of the Silknet
Warrants in accordance with the terms thereof, make available for issuance all
shares of Kana Common Stock covered thereby and shall, as promptly as
practicable after the Effective Time, issue to each holder of an outstanding
Silknet Warrant a document evidencing the foregoing assumption by Kana.

     Section 6.12      Stock Option and Voting Agreements.

                  Concurrently with the execution and delivery of this
Agreement, Silknet and Kana shall (a) execute and deliver the Silknet Stock
Option Agreement and the Kana Stock Option Agreement in the form annexed hereto
as Exhibit C and Exhibit D, respectively, and (b) cause each of their respective
directors and executive officers and each of their respective controlled
affiliates listed on Schedule 6.12 herewith to execute and deliver voting
agreements and irrevocable proxies in the applicable forms annexed hereto as
Exhibits A and B (the "Voting Agreements"), agreeing, among other things, to
vote in favor of the Merger and against any competing proposals. Silknet and
Kana shall each take all corporate action necessary to reserve for issuance a
sufficient number of shares of its common stock for delivery upon an exercise in
full of the option granted to Kana in the Silknet Stock Option Agreement and to
Silknet in the Kana Stock Option Agreement.

     Section 6.13      Board Composition.

                  Kana and the Kana Board of Directors shall take all action
required to increase the size of the Board to nine (9) as of the Effective Time
and to cause the election promptly after the Election Time by the Kana Board of
James C. Wood to the Kana Board for at least a period of one (1) year following
the Closing Date.

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<PAGE>   48
     Section 6.14      Brokers Or Finders.

                  Each of Kana and Silknet represents, as to itself, its
Subsidiaries and its affiliates, that no agent, broker, investment banker,
financial advisor or other firm or person is or will be entitled to any broker's
or finder's fee or any other commission or similar fee in connection with any of
the transactions contemplated by this Agreement except Credit Suisse First
Boston, whose fees and expenses will be paid by Silknet in accordance with
Silknet's agreement with such firm (copies of which have been delivered by
Silknet to Kana prior to the date of this Agreement), and Goldman, Sachs & Co.,
whose fees and expenses will be paid by Kana in accordance with Kana's agreement
with such firm (a copy of which has been delivered by Kana prior to the date of
this Agreement). Each of Kana and Silknet agrees to indemnify and hold the other
harmless from and against any and all claims, liabilities or obligations with
respect to any such fees, commissions or expenses asserted by any person on the
basis of any act or statement alleged to have been made by such party or any of
its Affiliates.

     Section 6.15      Stand-Off Agreements.

                  On or before the Effective Time, each officer and director of
Silknet and Kana and affiliates controlled by Silknet or Kana will execute a
Market Stand-Off Agreement in substantially the form attached hereto as Exhibit
E (the "Stand-Off Agreement").

     Section 6.16      Registration Rights.

                  On or before the Effective Time, Kana shall use all
commercially reasonable efforts to amend its Fourth Amended and Restated
Investors Rights Agreement to provide registration rights to Silknet Principal
Stockholders which possess rights to cause their Silknet Common Stock to be
registered, on a basis pari passu with the holders of Kana registration rights,
substantially in the form of Exhibit F hereto (the "Rights Agreement
Amendment").

     Section 6.17      Indemnification.

                  (a) From and after the Effective Time, Kana agrees that it
will, and will cause the Surviving Corporation to, indemnify and hold harmless
each present and former director and officer of Silknet (the "Indemnified
Parties"), against any costs or expenses (including attorneys' fees), judgments,
fines, losses, claims, damages, liabilities or amounts paid in settlement
(collectively, "Costs") incurred in connection with any claim, action, suit,
proceeding or investigation, whether civil, criminal, administrative or
investigative, arising out of or pertaining to matters existing or occurring at
or prior to the Effective Time, whether asserted or claimed prior to, at or
after the Effective Time, to the fullest extent that Silknet would have been
permitted under Delaware law and its certificate of incorporation or bylaws in
effect on the date hereof to indemnify such Indemnified Party (and Kana and the
Surviving Corporation shall also advance expenses as incurred to the fullest
extent permitted under applicable law, provided the Indemnified Party to whom
expenses are advanced provides an undertaking to repay such advances if it is
ultimately determined that such Indemnified Party is not entitled to
indemnification).

                  (b) For a period of six (6) years after the Effective Time,
Kana shall cause the Surviving Corporation to maintain (to the extent available
in the market) in effect a directors'

                                       42
<PAGE>   49
and officers' liability insurance policy covering those persons who are
currently covered by Silknet's directors' and officers' liability insurance
policy (a copy of which has been heretofore delivered to Kana) with coverage in
amount and scope at least as favorable as Silknet's existing coverage; provided,
that in no event shall Kana or the Surviving Corporation be required to expend
in excess of two hundred percent (200%) of the annual premium currently paid by
Silknet for such coverage as heretofore disclosed by Silknet to Kana (the
"Current Premium"); and if such premium would at any time exceed 200% of the
Current Premium, then the Surviving Corporation shall maintain insurance
policies which provide the maximum and best coverage available at an annual
premium equal to two hundred percent (200%) of the Current Premium.

                  (c) The provisions of this Section 6.17 are intended to be an
addition to the rights otherwise available to the current officers and directors
of Silknet by law, charter, statute, bylaw or agreement, and shall operate for
the benefit of, and shall be enforceable by, each of the Indemnified Parties,
their heirs and their representatives.

                  (d) To the extent there is any claim, action, suit, proceeding
or investigation (whether arising before or after the Effective Time) against
any Indemnified Party that arises out of or pertains to any action or omission
in his or her capacity as a director, officer, employee, principal stockholder,
fiduciary or agent of Silknet occurring prior to the Effective Time, or arises
out of or pertains to the transactions contemplated by this Agreement for a
period of six years after the Effective Time (whether arising before or after
the Effective Time), such Indemnified Party shall be entitled to be represented
by counsel and following the Effective Time (i) any counsel retained by the
Indemnified Parties shall be reasonably satisfactory to the Surviving
Corporation and Kana, (ii) the Surviving Corporation and Kana shall pay as
incurred the reasonable fees and expenses of such counsel, promptly after
statement therefor are received, and (iii) the Surviving Corporation and Kana
will cooperate in the defense of any such matter; provided, however, that
neither the Surviving Corporation nor Kana shall be liable for any settlement
effected without its written consent (which consent shall not be unreasonably
withheld, conditioned or delayed); and provided, further, that, in the event
that any claim or claims for indemnification are asserted or made within such
six-year period, all rights to indemnification in respect to any such claim or
claims shall continue until the final disposition of any and all such claims.
The Indemnified Parties as a group may retain only one law firm to represent
them with respect to any single action unless there is, under applicable
standards of professional conduct, a conflict on any significant issue between
the positions of any two or more Indemnified Parties. The provisions of this
Section are intended to be for the benefit of, and shall be enforceable by, each
Indemnified Party, his or her heirs and representatives.

     Section 6.18      Benefit Plans.

                  Kana agrees that, during the period commencing at the
Effective Time and continuing for a reasonable period thereafter, the employees
of Silknet and its Subsidiaries will continue to be provided with benefits under
employee benefit plans (other than stock option or other plans involving the
potential issuance of securities) each of which are listed in Section 3.13 of
the Silknet Disclosure Schedule which are substantially as favorable in the
aggregate as those currently provided by Silknet and its Subsidiaries to such
employees (except with respect to the 401(k) plan as provided below).

                                       43
<PAGE>   50
                  (a) Unless Kana consents otherwise in writing, Silknet shall
take all action necessary to terminate, or cause to terminate, before the
Effective Time, any Silknet Employee Plan that is a 401(k) plan or other defined
contribution retirement plan or employee stock purchase plan. Kana shall permit
the rollover of the accounts of participants in the Silknet 401(k) plans to the
Kana 401(k) plan (including outstanding loans of those participants who became
employees of Kana).

                  (b) Kana shall include Silknet employees in Kana's welfare
plans (within the meaning of Section 3(1) of ERISA) and fringe benefit plans on
the same basis and terms as Silknet employees currently participate and, in any
event, with respect to particular welfare plans of Kana, upon the termination of
the Silknet welfare plans. All welfare benefit plans of Kana or the Surviving
Corporation in which Silknet's employees participate after the Effective Time
shall (i) recognize expenses and claims that were incurred by Silknet' employees
in the year in which the Effective Time occurs and entitle Silknet employees to
applicable copayments and deductibles, if any, at a rate not higher than that in
effect under the corresponding welfare benefit plan of Silknet in effect at the
Effective Time, and (ii) provide coverage for preexisting health conditions to
the extent covered under the applicable plans or programs of Silknet as of the
Effective Time. In addition, for eligibility purposes under plans of the
Surviving Corporation or Kana, service by an employee for Silknet or any of its
subsidiaries and any predecessor prior to the Effective Time shall be taken into
account to the same extent as service for Kana; provided, that nothing hereby
shall require the inclusion any such employee in any such plan prior to the
Effective Time, and further provided, that in determining the amount of vacation
pay owed to any such Silknet employee from and after the Effective Time under
the applicable terms of the vacation pay plan of the Surviving Corporation or
Kana (which terms need not be comparable to the terms of the vacation plan or
policy of Silknet or any of its subsidiaries and any predecessor), credit shall
be given for such employee's service for Silknet or any of its subsidiaries and
any predecessor corporation prior to the Effective Time. Employees of Silknet or
any of its subsidiaries and any predecessor corporation as of the Effective Time
shall be permitted to participate in Kana's Employee Stock Purchase Plan (the
"Kana ESPP") (if any) commencing on the first enrollment date following the
Effective Time, subject to compliance with the eligibility provisions of such
plan (with employees receiving credit, for purposes of such eligibility
provisions, for service with Silknet or any of its subsidiaries and any
predecessor corporation. In addition, for eligibility and vesting purposes (but
not for benefit computation or accrual purposes) under plans of the Surviving
Corporation or the Parent, service by an employee for Silknet, its subsidiaries
and any of their predecessor corporations prior to the Effective Time shall be
taken into account to the same extent as service for Kana. Notwithstanding the
foregoing, for a period of no less than one year after the Effective Time, Kana
shall provide severance and termination benefits to employees of Silknet that
are no less favorable than those provided by Silknet to such Silknet employees
as of the date hereof.

                  (c) With respect to each benefit plan, program practice,
policy or arrangement maintained by Kana (the "Kana Employee Plans") in which
employees of Silknet subsequently participate, Kana will recognize such
employee's cumulative prior service to Silknet and its subsidiaries (and their
predecessor corporation) for purposes of determining eligibility to participate
in and for the vesting of benefits under such Kana Employee Plans; provided that
such recognition shall not be for the purpose of determining retirement benefits
and accrual. Such service also shall apply for purposes of satisfying any
waiting periods, evidence of

                                       44
<PAGE>   51
insurability requirements, or the application of any pre-existing condition
limitations. Each Kana Employee Plan shall waive pre-existing condition
limitations to the same extent waived under the applicable Silknet benefit plan.
Silknet Employees shall be given credit for amounts paid under a corresponding
benefit plan during the same period for purposes of applying deductibles,
copayments and out-of-pocket maximums as though such amounts had been paid in
accordance with the terms and conditions of the Kana Employee Plan.

     Section 6.19      Registration Statement; Joint Proxy Statement/Prospectus.

                  If at any time prior to the Effective Time any event relating
to Silknet or any of its Affiliates, officers or directors should be discovered
by Silknet which should be set forth in an amendment to the Registration
Statement or a supplement to the Joint Proxy Statement/Prospectus, Silknet shall
promptly inform Kana. If at any time prior to the Effective Time any event
relating to Kana or any of its Affiliates, officers or directors should be
discovered by Kana which should be set forth in an amendment to the Registration
Statement or a supplement to the Joint Proxy Statement/Prospectus, Kana shall
promptly inform Silknet.

     Section 6.20      Section 16.

                  Assuming that Silknet delivers to Kana the Section 16
Information (as defined below) in a timely fashion, the Board of Directors of
Kana, or a committee of two or more "non-employee directors" thereof (as such
item is defined for purposes of Rule 16b-3 under the Exchange Act), shall adopt
resolutions prior to the consummation of the Merger, providing that the receipt
by Silknet Insiders (as defined below) of Kana Common Stock in exchange for
Silknet Common Stock, and of options and warrants for Kana Common Stock upon
conversion of outstanding options and warrants of Silknet, in each case pursuant
to the transactions contemplated hereby and to the extent such securities are
listed in the Section 16 Information, are intended to be exempt from liability
pursuant to Section 16(b) under the Exchange Act. Such resolutions shall comply
with the approval conditions of Rule 16b-3 under the Exchange Act for purposes
of such Section 16(b) exemption, including, but not limited to, specifying the
name of Silknet Insiders, the number of equity securities to be acquired or
disposed of for each such person, the material terms of any derivative
securities, and that the approval is intended to make the receipt of such
securities exempt pursuant to Rule 16b-3(d). "Section 16 Information" shall mean
information accurate in all respects regarding Silknet Insiders, the number of
Silknet Common Stock (or options or warrants therefor, collectively, the
"Options") held by each such Silknet Insider and expected to be exchanged for
Kana Common stock in the Merger, and the number and description of the Options
held by each such Silknet Insider and expected to be converted into options or
warrants for Kana Common Stock in connection with the Merger. "Silknet Insiders"
shall mean those officers, directors and 10% stockholders of Silknet who will be
subject to the reporting requirements of Section 16(b) of the Exchange Act with
respect to Kana and who are listed in the Section 16 Information.

                                       45
<PAGE>   52
                                  ARTICLE VII.

                              CONDITIONS TO MERGER

     Section 7.01      Conditions To Each Party's Obligation To Effect
                       The Merger.

                  The respective obligations of each party to this Agreement to
effect the Merger shall be subject to the satisfaction prior to the Closing Date
of the following conditions:

                  (a) Stockholder Approval. This Agreement and the Merger shall
have been approved and adopted by the affirmative vote of the holders of a
majority of the outstanding shares of Silknet Common Stock and the Kana Voting
Proposal shall have been approved by the affirmative vote of the holders of a
majority of the shares of Kana Common Stock present or represented at the Kana
Stockholders' Meeting at which a quorum is present.

                  (b) Approvals. Other than the filing provided for by Section
1.01, all authorizations, consents, orders or approvals of, or declarations or
filings with, or expirations of waiting periods imposed by, any Governmental
Entity shall have been obtained or made or shall have expired, other than those,
the absence of which would not reasonably be expected to have a Kana Material
Adverse Effect or Silknet Material Adverse Effect and would not prohibit or
render unlawful the consummation of the Merger.

                  (c) Registration Statement. The Registration Statement shall
have become effective under the Securities Act and shall not be the subject of
any stop order or proceedings seeking a stop order.

                  (d) No Legal Impediment. No Governmental Entity or federal,
state or foreign court of competent jurisdiction shall have enacted, issued,
promulgated, enforced or entered any Order, statute, rule or regulation which is
in effect and which has the effect of making the Merger unlawful or otherwise
prohibiting consummation of the Merger.

                  (e) Nasdaq. The shares of Kana Common Stock to be issued in
the Merger shall have been approved for quotation on the Nasdaq.

     Section 7.02      Additional Conditions To Obligations Of Kana And Merger
                       Sub.

                  The obligations of Kana and Merger Sub to effect the Merger
are subject to the satisfaction of each of the following conditions, any of
which may be waived in writing exclusively by Kana and Merger Sub:

                  (a) Representations And Warranties. The representations and
warranties of Silknet set forth in this Agreement shall be true and correct as
of the date of this Agreement and as of the Closing Date as though made on and
as of the Closing Date, other than representations and warranties which speak as
of an earlier date (which shall be true and correct as of such earlier date) and
except for (i) changes contemplated by this Agreement and (ii) where the failure
to be true and correct, individually or in the aggregate, has not had and will
not, determined as of the Closing Date and solely with the passage of time, have
a Silknet Material Adverse Effect.

                                       46
<PAGE>   53
                  (b) Performance Of Obligations Of Silknet. Silknet shall have
performed in all material respects all obligations required to be performed by
it under this Agreement at or prior to the Closing Date.

                  (c) Certificate. Kana shall have received a certificate signed
on behalf of Silknet by the chief executive officer and the chief financial
officer of Silknet to the effect that the conditions set forth in Section
7.02(a) and Section 7.02(b) are satisfied.

                  (d) Stand-Off Agreements. Each officer and director of and
each affiliate controlled by Silknet shall have entered into Stand-Off
Agreements, pursuant to which each such person will agree not to sell, transfer,
pledge, hypothecate or otherwise dispose of any shares of Silknet Common Stock
held as of the date of such agreement or later acquired by such person for a
period ending 90 days after the Closing.

                  (e) Tax Opinion. Kana shall have received a written opinion
from Brobeck, Phleger & Harrison LLP, counsel to Kana, to the effect that the
Merger will be treated for federal income tax purposes as a tax-free
reorganization within the meaning of Section 368(a) of the Internal Revenue
Code. The parties to this Agreement shall make reasonable representations as
requested by such counsel for the purpose of rendering such opinion.

                  (f) Absence of Material Adverse Effect. No Silknet Material
Adverse Effect or Kana Material Adverse Effect shall have occurred, and no fact
or circumstance shall exist which will, determined as of the Closing Date and
solely with the passage of time, result in a Silknet Material Adverse Effect.

     Section 7.03      Additional Conditions To Obligations Of Silknet.

                  The obligation of Silknet to effect the Merger is subject to
the satisfaction of each of the following conditions, any of which may be
waived, in writing, exclusively by Silknet:

                  (a) Representations And Warranties. The representations and
warranties of Kana and Merger Sub set forth in this Agreement shall be true and
correct as of the date of this Agreement and as of the Closing Date as though
made on and as of the Closing Date, other than representations which speak as of
an earlier date (which shall be true and correct as of such earlier date) and
except for, (i) changes contemplated by this Agreement and (ii) where the
failures to be true and correct, individually or in the aggregate, have not had
and will not, determined as of the Closing Date and solely with the passage of
time, have a Kana Material Adverse Effect.

                  (b) Performance Of Obligations Of Kana And Merger Sub. Kana
and Merger Sub shall have performed in all material respects all obligations
required to be performed by them under this Agreement at or prior to the Closing
Date.

                  (c) Certificate. Silknet shall have received a certificate
signed on behalf of Kana by the chief executive officer and the chief financial
officer of Kana to the effect that the conditions set forth in Section 7.03(a)
and Section 7.03(b) are satisfied.

                                       47
<PAGE>   54
                  (d) Stand-Off Agreements. Each officer and director of and
each affiliate controlled by Kana shall have entered into Stand-Off Agreements,
pursuant to which each such person will agree not to sell, transfer, pledge,
hypothecate or otherwise dispose of any shares of Kana Common Stock held as of
the date of such agreement or later acquired by such person for a period ending
90 days after the Closing Date.

                  (e) Tax Opinion. Silknet shall have received the opinion of
Testa, Hurwitz &Thibeault, LLP, counsel to Silknet, to the effect that the
Merger will be treated for federal income tax purposes as a tax-free
reorganization within the meaning of Section 368(a) of the Internal Revenue
Code. The parties to this Agreement shall make reasonable representations as
requested by such counsel for the purpose of rendering such opinion.

                  (f) Absence of Kana Material Adverse Effect. No Kana Material
Adverse Effect shall have occurred, and no fact or circumstance shall exist
which will, determined as of the Closing Date and solely with the passage of
time, result in a Kana Material Adverse Effect.

                  (g) Rights Agreement Amendment. Kana shall have delivered the
Rights Agreement Amendment.

     Section 7.04      Frustration of Closing Conditions.

                  Neither Kana, Merger Sub nor Silknet may rely on the failure
of any condition set forth in Section 7.01, 7.02 or 7.03, as the case may be, to
be satisfied if such failure was caused by such party's failure to use
reasonable efforts to consummate the Merger and the other transactions
contemplated by this Agreement and the Stock Option Agreements, as required by
and subject to Section 6.07.

                                 ARTICLE VIII.

                            TERMINATION AND AMENDMENT

     Section 8.01      Termination.

                  At any time prior to the Effective Time, whether before or
after approval of the matters presented in connection with the Merger by the
stockholders of Silknet, this Agreement may be terminated:

                  (a) by mutual consent duly authorized by the Boards of
Directors of Kana and Silknet;

                  (b) by either Kana or Silknet, if the Closing shall not have
occurred on or before July 31, 2000 (provided, that the right to terminate this
Agreement under this Section 8.01(b) shall not be available to any party whose
action or failure to act has been the cause or resulted in the failure of the
Merger to occur on or before such date and such action or failure to act
constitutes a material breach of this Agreement);

                                       48
<PAGE>   55
                  (c) by Kana, if (i) Silknet shall have breached any
representation or warranty made as of the date of this Agreement, or shall
breach any obligation or agreement hereunder in a manner causing conditions
precedent to the Closing not to be satisfied and such breach shall not have been
cured within twenty (20) business days of receipt by Silknet of written notice
of such breach, provided that the right to terminate this Agreement by Kana
under this Section 8.01(c)(i) shall not be available to Kana where Kana is at
that time in material breach of this Agreement, or (ii) the Board of Directors
of Silknet shall have omitted, withdrawn or modified its recommendation of this
Agreement or the Merger in a manner adverse to Kana or recommended, endorsed,
accepted or agreed to a Silknet Takeover Proposal or shall have resolved to do
any of the foregoing;

                  (d) by Silknet, if (i) Kana shall have breached any
representation or warranty made as of the date of this Agreement, or shall
breach any obligation or agreement hereunder in a manner causing conditions
precedent to the Closing not to be satisfied and such breach shall not have been
cured within twenty (20) business days following receipt by Kana of written
notice of such breach, provided that the right to terminate this Agreement by
Silknet under this Section 8.01(d)(i) shall not be available to Silknet where
Silknet is at that time in material breach of this Agreement, or (ii) the Board
of Directors of Kana shall have omitted, withdrawn or modified its
recommendation of this Agreement or the Merger in a manner adverse to Silknet or
recommended, endorsed, accepted or agreed to a Kana Takeover Proposal or shall
have resolved to do any of the foregoing;

                  (e) by Kana if (i) any permanent injunction or other order of
a court or other competent authority preventing the consummation of the Merger
shall have become final and nonappealable, (ii) if any required approval of the
stockholders of Silknet shall not have been obtained by reason of the failure to
obtain the required vote upon a vote held at a duly held meeting of stockholders
or at any adjournment thereof, or (iii) the Kana Voting Proposal is not obtained
at the Kana Stockholders Meeting or at any adjournment thereof; or

                  (f) by Silknet if (i) any permanent injunction or other order
of a court or other competent authority preventing the consummation of the
Merger shall have become final and nonappealable, (ii) if any required approval
of the stockholders of Silknet shall not have been obtained by reason of the
failure to obtain the required vote upon a vote held at a duly held meeting of
stockholders or at any adjournment thereof, or (iii) the Kana Voting Proposal is
not obtained at the Kana Stockholders Meeting or at any adjournment thereof.

                  (g) by Kana, if Silknet or any of its Representatives shall
participate in discussions or negotiations, or take any other action, in breach
(other than an immaterial breach) of Section 6.02.

                  (h) by Silknet, if Kana or any of its Representatives shall
participate in discussions or negotiations, or take any other action, in breach
(other than an immaterial breach) of Section 6.03.

                  (i) by Silknet, in response to a Silknet Superior Offer which
was not solicited by Silknet; provided that Silknet shall have complied in all
material respects with its obligations under Sections 6.02 (no-shop) and 6.06
(stockholder meetings) and such Silknet Superior Offer

                                       49
<PAGE>   56
did not otherwise result from a breach of any of Silknet's obligations under
this Agreement; and provided further, that no termination pursuant to this
Section 8.01(i) shall be effective until after the fifth business day following
Kana's receipt of written notice advising Kana that the Board of Directors of
Silknet is prepared to accept a Silknet Superior Offer, specifying the material
terms and conditions of such Silknet Superior Offer and identifying the person
making such Silknet Superior Offer; and the payment of any applicable
termination fee pursuant to Section 8.03.

                  (j) by Kana, in response to a Kana Superior Offer which was
not solicited by Kana; provided that Kana shall have complied in all material
respects with its obligations under Sections 6.03 (no-shop) and 6.06
(stockholder meetings) and such Kana Superior Offer did not otherwise result
from a breach of any of Kana's obligations under this Agreement; and provided
further, that no termination pursuant to this Section 8.01(j) shall be effective
until after the fifth business day following Silknet's receipt of written notice
advising Silknet that the Board of Directors of Kana is prepared to accept a
Kana Superior Offer, specifying the material terms and conditions of such Kana
Superior Offer and identifying the person making such Kana Superior Offer; and
the payment of any applicable termination fee pursuant to Section 8.03.

     Section 8.02      Effect of Termination.

                  In the event of termination of this Agreement as provided in
Section 8.01, this Agreement shall forthwith become void and there shall be no
liability or obligation on the part of Kana or Silknet or their respective
officers, directors, security holders or affiliates, except as provided in
Section 8.03 and/or except to the extent that such termination results from the
breach by a party hereto of any of its representations, warranties, covenants or
agreements set forth in this Agreement involving fraud, intentional
misrepresentation or willful misconduct; provided that the provisions of Section
8.03 and this Section 8.02 shall remain in full force and effect and survive any
termination of this Agreement.

     Section 8.03      Expenses and Termination Fees.

                  (a) Subject to Sections 8.03(b) and 8.03(c), whether or not
the Merger is consummated, all costs and expenses incurred in connection with
this Agreement, related agreements and documents and the transactions
contemplated hereby and thereby (including the fees and expenses of its
advisers, accountants and legal counsel) shall be paid by the party incurring
such expense.

                  (b) In the event that (i) after a Silknet Takeover Proposal
has been made to Silknet or to Silknet stockholders generally or otherwise has
become publicly known, this Agreement shall be terminated by Kana pursuant to
Section 8.01(c)(i) or Section 8.01(e)(ii) or by Silknet pursuant to Section
8.01(f)(ii) or by either party pursuant to Section 8.01(b), or (ii) this
Agreement shall be terminated by Kana pursuant to Section 8.01(c)(ii) (other
than as a result of a change in the Silknet Board's recommendation based on a
right of termination by Silknet under Section 8.01(d)(i)), or Section 8.01(g),
or (iii) this Agreement shall be terminated by Silknet pursuant to Section
8.01(i), then, in any such event, in addition to any other remedies Kana may
have, Silknet shall pay to Kana the sum of one hundred forty-eight million three
hundred thousand dollars ($148,300,000), (x) which shall be due and payable in
full upon termination of this Agreement (in the case of termination by Silknet
pursuant to Section 8.01(i)) and (y) forty

                                       50
<PAGE>   57
million dollars ($40,000,000) of which shall be due and payable upon termination
of this Agreement and the balance of which shall be due and payable upon the
consummation of a Silknet Takeover Proposal at any time prior to the first
anniversary of the termination of this Agreement (in all other cases within the
scope of this Section 8.03(b)). All payments pursuant to Section 8.03(b) shall
be made by wire transfer of same-day funds to an account specified by Kana.

                  (c) In the event that (i) after a Kana Takeover Proposal has
been made to Kana or to Kana stockholders generally or otherwise has become
publicly known, this Agreement shall be terminated by Silknet pursuant to
Section 8.01(d)(i) or Section 8.01(f)(iii) or by Silknet pursuant to Section
8.01(e)(iii) or by either party pursuant to Section 8.01(b), or (ii) this
Agreement shall be terminated by Silknet pursuant to Section 8.01(d)(ii) (other
than as a result of a change in the Kana Board's recommendation based on the
occurrence of a circumstance giving rise to a right of termination by Kana under
Section 8.01(c)(i)), or Section 8.01(h), or (iii) this Agreement shall be
terminated by Kana pursuant to Section 8.01(j), then, in any such event, in
addition to any other remedies Silknet may have, Kana shall pay to Silknet the
sum of one hundred forty-eight million three hundred thousand dollars
($148,300,000), (x) which shall be due and payable in full upon termination of
this Agreement (in the case of termination by Kana pursuant to Section 8.01(j))
and (y) forty million dollars ($40,000,000) of which shall be due and payable
upon termination of this Agreement and the balance of which shall be due and
payable upon the consummation of a Kana Takeover Proposal at any time prior to
the first anniversary of the termination of this Agreement (in all other cases
within the scope of this Section 8.03(c)). All payments pursuant to Section
8.03(c) shall be made by wire transfer of same-day funds to an account specified
by Silknet.

                  (d) Each party acknowledges that the agreements contained in
this Section 8.03 are an integral part of the transactions contemplated by this
Agreement, and that, without these agreements, the other party would not enter
into this Agreement; accordingly, if a party fails promptly to pay the amount
due pursuant to this Section 8.03 and, in order to obtain such payment, the
other party commences a suit which results in a judgment or settlement for the
fee set forth in this Section 8.03, the liable party shall pay to the party
commencing such suit its costs and expenses (including attorneys' fees and
expenses) in connection with such suit, together with interest on the amount of
the fee at the prime rate of Citibank, N.A. in effect on the date such payment
was required to be made.

     Section 8.04      Amendment.

                  This Agreement may be amended by the parties hereto, by action
taken or authorized by their respective Boards of Directors, at any time before
or after approval of the matters presented in connection with the Merger by the
stockholders of Silknet or of Kana, but, after any such approval, no amendment
shall be made which by law requires further approval by such stockholders
without such further approval. This Agreement may not be amended except by a
written instrument signed on behalf of each of the parties hereto.

     Section 8.05      Extension; Waiver.

                  At any time prior to the Effective Time any party hereto may,
to the extent legally allowed, (i) extend the time for the performance of any of
the obligations or other acts of the

                                       51
<PAGE>   58
other parties hereto, (ii) waive any inaccuracies in the representations and
warranties made to such party contained herein or in any document delivered
pursuant hereto or (iii) waive compliance with any of the agreements or
conditions for the benefit of such party contained herein. Any agreement on the
part of a party hereto to any such extension or waiver shall be valid only if
set forth in a written instrument signed on behalf of such party.

                                  ARTICLE IX.

                                  MISCELLANEOUS

     Section 9.01      Nonsurvival Of Representations, Warranties And
                       Agreements.

                  None of the representations, warranties and agreements in this
Agreement or in any instrument delivered pursuant to this Agreement shall
survive the Effective Time, except for the agreements contained in Section 1.04,
Section 2.01, Section 2.02, Section 6.13, Section 6.14, Section 6.15, Section
6.17, Section 6.18, Section 19 and Article IX. The Confidentiality Agreement
between Kana and Silknet dated as of February 1, 2000 (the "Confidentiality
Agreement") shall survive the execution and delivery of this Agreement.

     Section 9.02      Notices.

                  All notices and other communications hereunder shall be in
writing and shall be deemed given if delivered personally or by a nationally
recognized express overnight courier service, telecopied (which is confirmed) or
mailed by registered or certified mail (return receipt requested), to the
parties at the following addresses (or at such other address for a party as
shall be specified by like notice):

                  (a) if to Kana or Merger Sub, to:

                           Kana Communications, Inc.
                           740 Bay Road
                           Redwood City, CA  94063
                           Fax:     (650) 474-8501
                           Attn.:  Chief Executive Officer

                           with a copy to:

                           Warren T. Lazarow, Esq.
                           David A. Makarechian, Esq.
                           Brobeck, Phleger & Harrison LLP
                           Two Embarcadero Place
                           2200 Geng Road
                           Palo Alto, CA 94303
                           Fax: (650) 496-2885

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<PAGE>   59
                           and to:

                           Rod J. Howard, Esq.
                           Brobeck, Phleger & Harrison LLP
                           Two Embarcadero Place
                           2200 Geng Road
                           Palo Alto, CA 94303
                           Fax: (650) 496-2777

                  (b) if to Silknet, to:

                           Silknet Software Inc.
                           50 Phillippe Cote Street
                           Manchester, NH  03101
                           Fax:     (603) 625-0428
                           Attn.:  Chief Executive Officer

                           with a copy to:

                           John Hession, Esq.
                           Testa, Hurwitz & Thibeault, LLP
                           Oliver Street Tower
                           125 High Street
                           Boston, MA 02110
                           Fax: (617) 248-7100

     Section 9.03      Definitions.

                  For purposes of this Agreement:

                  (a) "Silknet Material Adverse Effect" means any change,
effect, event, occurrence, state of facts or development that is materially
adverse to the business, financial condition or results of operations of Silknet
and its Subsidiaries, taking Silknet and its Subsidiaries together as a whole,
provided, however, that none of the following shall be deemed either alone or in
combination, to constitute a Material Adverse Effect; (a) any change in the
market price or trading volume of Silknet after the date hereof; (b) any failure
by Silknet to meet the revenue or earnings predictions or other expectations of
equity analysts, or any decrease in revenues from prior periods, for any period
ending (or for which earnings are released) on or after the date of this
Agreement; (c) any adverse effect on the bookings, revenues, gross margins or
earnings of Silknet (or the direct consequence thereof) following the date of
this Agreement which is directly and primarily attributable to or arises
directly and primarily from a delay of, reduction in or cancellation or change
in the terms or timing of product orders by customers of Silknet or any change
in the timing of projects or implementations, purchasing patterns or habits of
Silknet customers, whether current or prospective, or any indecision of any such
customer regarding Silknet products or Services; (d) any change arising directly
and primarily out of conditions affecting the electronic customer relationship
management (eCRM) market, the U.S. economy as a whole or the international
economy as a whole or any political, economic or social

                                       53
<PAGE>   60
instability in any such markets or economies; (e) any termination or
modification of any existing Silknet contract with a customer or termination or
modifications of negotiations between Silknet and its customers (however, this
proviso shall not exclude any underlying change, effect, event, occurrence,
state of facts or development which results in a change in price or trading
volume within the scope of clause (a) or a failure to meet estimates,
predictions or expectations within the scope of clause (b).

                  (b) "Kana Material Adverse Effect" means any change, effect,
event, occurrence, state of facts or development that is, materially adverse to
the business, financial condition or results of operations of Kana and its
Subsidiaries, taking Kana and its Subsidiaries together as a whole, provided,
however, that none of the following shall be deemed either alone or in
combination, to constitute a Material Adverse Effect; (a) any change in the
market price or trading volume of Kana after the date hereof; (b) any failure by
Kana to meet the revenue or earnings predictions or other expectations of equity
analysts, or any decrease in revenues from prior periods, for any period ending
(or for which earnings are released) on or after the date of this Agreement; (c)
any adverse effect on the bookings, revenues, gross margins or earnings of Kana
(or for direct consequence thereof) following the date of this Agreement which
is directly and primarily attributable to or arises directly and primarily from
a delay of, reduction in or cancellation or change in the terms or timing of
product orders by customers of Kana or any change in the timing of projects or
implementations, purchasing patterns or habits of Kana customers, whether
current or prospective, or any indecision of any such customer regarding Kana
products or services; (d) any change arising directly and primarily out of
conditions affecting the electronic customer relationship management (eCRM)
markets, the U.S. economy as a whole or the international economy as a whole or
any political, economic or social instability in any such markets or economies;
(e) any termination or modification of any existing Kana contract with a
customer or termination or modifications of negotiations between Kana and its
customers (however, this proviso shall not exclude any underlying change,
effect, event, occurrence, state of facts or developments which results in a
change in price or trading volume within the scope of clause (a) or a failure to
meet estimates, predictions or expectations within the scope of clause (b)).

     Section 9.04      Interpretation.

                  When a reference is made in this Agreement to Sections, such
reference shall be to a Section of this Agreement unless otherwise indicated.
The table of contents and headings contained in this Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Agreement. Whenever the words "include," "includes" or "including" are used
in this Agreement they shall be deemed to be followed by the words "without
limitation." The phrase "made available" in this Agreement shall mean that the
information referred to has been made available if requested by the party to
whom such information is to be made available. The phrases "the date of this
Agreement", "the date hereof," and terms of similar import, unless the context
otherwise requires, shall be deemed to refer to February 6, 2000.

                                       54
<PAGE>   61
     Section 9.05      Counterparts.

                  This Agreement may be executed in two or more counterparts,
all of which shall be considered one and the same agreement and shall become
effective when two or more counterparts have been signed by each of the parties
and delivered to the other parties, it being understood that all parties need
not sign the same counterpart.

     Section 9.06      Entire Agreement; No Third Party Beneficiaries.

                  This Agreement (including the documents and the instruments
referred to herein) (a) constitute the entire agreement and supersedes all prior
agreements and understandings, both written and oral, among the parties with
respect to the subject matter hereof, and (b) except as provided in Section 6.14
are not intended to confer upon any person other than the parties hereto any
rights or remedies hereunder; provided that the Confidentiality Agreement shall
remain in full force and effect until the Effective Time. Each party hereto
agrees that, except for the representations and warranties contained in this
Agreement, neither Silknet nor Kana makes any other representations or
warranties, and each hereby disclaims any other representations and warranties
made by itself or any of its officers, directors, employees, agents, financial
and legal advisors or other representatives, with respect to the execution and
delivery of this Agreement or the transactions contemplated hereby,
notwithstanding the delivery or disclosure to the other or the other's
representatives of any documentation or other information with respect to any
one or more of the foregoing.

     Section 9.07      Governing Law.

                  This Agreement shall be governed and construed in accordance
with the laws of the State of Delaware, including matters relating to merger
procedure, corporate governance and fiduciary duty without regard to any
applicable conflicts of law. All disputes or controversies shall be settled in
the Delaware Chancery Court and each party irrevocably and unconditionally
consents and submits to the jurisdiction of the courts of the State of Delaware
for any actions, suits or proceedings arising out of or relating to this
Agreement and the transactions contemplated hereby.

     Section 9.08      Assignment.

                  Neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto (whether by
operation of law or otherwise) without the prior written consent of the other
parties. Subject to the preceding sentence, this Agreement will be binding upon,
inure to the benefit of and be enforceable by the parties and their respective
successors and assigns.


                            [SIGNATURE PAGE FOLLOWS]

                                       55
<PAGE>   62
                  IN WITNESS WHEREOF, Kana, Merger Sub and Silknet have caused
this Agreement to be signed by their respective officers thereunto duly
authorized as of the date first written above.



KANA COMMUNICATIONS, INC.                  PISTOL ACQUISITION CORP.


By: /s/ Michael J. McCloskey               By: /s/ Michael J. McCloskey
   ----------------------------               ----------------------------------
Title:  Chief Executive Officer            Title:  President



                                           SILKNET SOFTWARE INC.


                                           By: /s/ James C. Wood
                                              ----------------------------------
                                           Title:  Chief Executive Officer























            [SIGNATURE PAGE TO AGREEMENT AND PLAN OF REORGANIZATION]
<PAGE>   63
                                    EXHIBIT A

                            SILKNET VOTING AGREEMENT
<PAGE>   64
                                    EXHIBIT B

                              KANA VOTING AGREEMENT
<PAGE>   65
                                    EXHIBIT C

                         SILKNET STOCK OPTION AGREEMENT
<PAGE>   66
                                    EXHIBIT D

                           KANA STOCK OPTION AGREEMENT
<PAGE>   67
                                    EXHIBIT E

                               STAND-OFF AGREEMENT
<PAGE>   68
                                    EXHIBIT F

                           RIGHTS AMENDMENT AGREEMENT

<PAGE>   1

                                                                    EXHIBIT 99.2

                           KANA STOCK OPTION AGREEMENT


         THIS KANA STOCK OPTION AGREEMENT (this "Agreement") is made and entered
into as of February 6, 2000, between Silknet Software Inc., a Delaware
corporation ("Silknet"), and Kana Communications, Inc., a Delaware corporation
(the "Company"). Capitalized terms used but not otherwise defined herein have
the meanings ascribed to them in the Merger Agreement (as defined below).

                                    RECITALS

         A. Concurrently with the execution and delivery of this Agreement, the
Company, Merger Sub (as defined below) and Silknet are entering into an
Agreement and Plan of Merger (the "Merger Agreement") that provides for the
merger of a wholly-owned subsidiary of the Company ("Merger Sub") with and into
Silknet (the "Merger"). Pursuant to the Merger, each share of common stock, par
value $0.01 per share, of Silknet will be converted into the right to receive
common stock, par value $0.001 per share, of the Company, upon the terms and
subject to the conditions set forth in the Merger Agreement.

         B. As a condition to Silknet's willingness to enter into the Merger
Agreement, Silknet has required that the Company agree, and the Company has so
agreed, to grant to Silknet an option to acquire shares of common stock, par
value $0.001 per share ("Company Shares"), upon the terms and subject to the
conditions set forth herein.

         NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements set forth herein and in the Merger Agreement and for
other good and valuable consideration, the receipt and adequacy of which are
hereby acknowledged, the parties hereto agree as follows:

         1. Grant of Option.

         The Company hereby grants to Silknet an irrevocable option (the
"Option") to purchase from the Company up to the number of fully paid and
nonassessable Company Shares equal to nine and nine-tenths percent (9.9%) of the
Company Shares issued and outstanding at the time of exercise of the Option (the
"Option Shares"), in the manner set forth below by paying cash to the Company at
a price of two hundred fifty-eight dollars and eight-eight cents ($258.88) per
Company Share (the "Exercise Price").

         2. Exercise of Option.

                (a) The Option may be exercised by Silknet, in whole or in part,
at any time or from time to time on or after the occurrence of an Exercise
Event. The Company shall notify Silknet promptly in writing of the occurrence of
any Exercise Event, it being understood that the giving of such notice by the
Company shall not be a condition to the right of Silknet to exercise the option.
For all purposes of this Agreement, an "Exercise Event" shall mean the
occurrence of any of (i) a Triggering Event (as defined below), (ii) the public
announcement of an Acquisition Proposal (as defined below), or (iii) the
commencement of a solicitation within the meaning of Rule 14a-1(1) by

<PAGE>   2

any person or entity seeking control of the Company's Board of Directors in
opposition to the Merger. If Silknet wishes to exercise the Option, Silknet will
deliver to the Company a written notice (each an "Exercise Notice") specifying
the total number of Option Shares it wishes to acquire. Each closing of a
purchase of Option Shares (a "Closing") will occur on a date and at a time prior
to the termination of the Option designated by Silknet in an Exercise Notice
delivered at least two (2) business days prior to the date of such Closing,
which Closing will be held at the principal offices of the Company.

                  (i) For purposes of this Agreement, "Acquisition Proposal"
shall mean any offer or proposal (other than by Silknet) for a transaction or
series of related transactions involving: (A) any purchase from the Company or
acquisition by any person or "group" (as defined in Section 13(d) of the
Exchange Act and the rules and regulations thereunder) of a majority of the
total outstanding voting securities of the Company or any of its subsidiaries or
any tender offer or exchange offer that if consummated would result in any
person or group beneficially owning a majority of the total outstanding voting
securities of the Company or any merger, consolidation, business combination or
similar transaction involving the Company; (B) any sale, lease (other than in
the ordinary course of business), exchange, transfer, license (other than in the
ordinary course of business), acquisition or disposition of a majority of the
assets of the Company; or (C) any liquidation or dissolution of the Company.

                  (ii) For purposes of this Agreement, a "Triggering Event"
shall be deemed to have occurred if: (i) the Board of Directors of the Company
or any committee thereof shall for any reason have withdrawn or shall have
amended or modified in a manner adverse to Silknet its recommendation in favor
of the approval of the issuance of Company Common Stock pursuant to the Merger
Agreement; (ii) the Company shall have failed to include in the Joint Proxy
Statement/Prospectus the recommendation of the Board of Directors of the Company
in favor of the issuance of Company Common Stock pursuant to the Merger
Agreement; (iii) the Board of Directors of the Company shall have failed to
reaffirm its recommendation in favor of the issuance of Company Common Stock
pursuant to the Merger Agreement within ten (10) business days after Silknet
requests in writing that such recommendation be reaffirmed at any time following
the making, announcement or submission of a Kana Takeover Proposal (as such term
is defined in the Merger Agreement); or (iv) a tender or exchange offer for a
majority of the outstanding voting securities of the Company shall have been
commenced by a person unaffiliated with the Company and the Company shall not
have sent to its security holders pursuant to Rule 14e-2 promulgated under the
Securities Act, within ten (10) business days after such tender or exchange
offer is first published sent or given, a statement disclosing that the Company
recommends rejection of such tender or exchange offer.

         (b) The Option and this Agreement will terminate upon the earliest of
(i) the Effective Time, (ii) termination of the Merger Agreement pursuant to
Section 8.01(a) thereof, (iii) termination of the Merger Agreement pursuant to
Section 8.01(e)(i) or 8.01(f)(i) thereof or otherwise under circumstances which
cannot give rise to a termination fee under Section 8.03(c) of the Merger
Agreement if prior thereto no Exercise Event shall have occurred or (iv) twelve
(12) months following the termination of the Merger Agreement under any other
circumstances; provided, however, that if the Option cannot be exercised by
reason of any applicable judgment, decree, order, law or regulation (including,
without limitation, if the waiting period related to the issuance of the Option
Shares under the HSR Act shall not have expired or been terminated), then


                                       2
<PAGE>   3

the Option will not terminate until the forty fifth (45th) business day after
such impediment to exercise will have been removed or will have become final and
not subject to appeal. In addition, the period for the exercise of the Option
shall be extended to the extent necessary to avoid liability under Section 16(b)
of the Securities Exchange Act of 1934, as amended, and the rules and
regulations of the Securities and Exchange Commission thereunder, by reason of
such exercise.

         3. Conditions to Closing.

         The obligation of the Company to issue Option Shares to Silknet
hereunder is subject to the conditions that (A) any waiting period under the HSR
Act applicable to the issuance of the Option Shares hereunder shall have expired
or been terminated; (B) all material consents, approvals, orders or
authorizations of, or registrations, declarations or filings with, any United
States Federal, state or local administrative agency or commission or other
United States Federal state or local governmental authority or instrumentality,
if any, required in connection with the issuance of the Option Shares hereunder
shall have been obtained or made, as the case may be; and (C) no preliminary or
permanent injunction or other order by any court of competent jurisdiction or
other Governmental Entity in the United States prohibiting or otherwise
restraining such issuance shall be in effect. It is understood and agreed that
at any time during which the Option is exercisable, the parties will use their
respective best efforts to satisfy all conditions to Closing, so that a Closing
may take place as promptly as practicable.

         4. Closing.

         At any Closing, (A) the Company will deliver to Silknet a single
certificate in definitive form representing the number of Company Shares
designated by Silknet in its Exercise Notice, such certificate to be registered
in the name of Silknet and to bear the restrictive legend set forth in Section 9
hereof, against delivery of (B) payment by Silknet to the Company of the
aggregate purchase price for the Company Shares so designated and being
purchased by wire transfer of immediately available funds to an account
designated by the Company, provided that failure or refusal of the Company to
designate such an account shall not preclude Silknet from exercising the Option.
Upon delivery of an Exercise Notice and the tender of the aggregate purchase
price in immediately available funds, Silknet shall be deemed to be the holder
of record of the Option Shares issuable upon such exercise, notwithstanding that
the stock transfer books of the Company shall then be closed or that
certificates representing such Company Shares shall not be actually delivered to
Silknet.

         5. Representations and Warranties of the Company.

         The Company represents and warrants to Silknet that (A) the Company is
a corporation duly incorporated, validly existing and in good standing under the
laws of the State of Delaware and has the corporate power and authority to enter
into this Agreement and to carry out its obligations hereunder; (B) the
execution and delivery of this Agreement by the Company and consummation by the
Company of the transactions contemplated hereby have been duly authorized by all
necessary corporate action on the part of the Company and no other corporate
proceedings on the part of the Company are necessary to authorize this Agreement
or any of the transactions contemplated hereby; (C) this Agreement has been duly
executed and delivered by the Company and constitutes a legal, valid and binding
obligation of the Company enforceable against the


                                       3
<PAGE>   4

Company in accordance with its terms; (D) the Company has taken all necessary
corporate and other action to authorize and reserve for issuance and to permit
it to issue upon exercise of the Option, and at all times from the date hereof
until the termination of the Option will have reserved for issuance, a
sufficient number of unissued Company Shares for Silknet to exercise the Option
in full and will take all necessary corporate or other action to authorize and
reserve for issuance all additional Company Shares or other securities which may
be issuable pursuant to Section 8(a) upon exercise of the Option, all of which,
upon their issuance and delivery in accordance with the terms of this Agreement,
will be validly issued, fully paid and nonassessable; (E) upon delivery of the
Company Shares and any other securities to Silknet upon exercise of the Option,
Silknet will acquire such Company Shares or other securities free and clear of
all material claims, liens, charges, encumbrances and security interests of any
kind or nature whatsoever; (F) the execution and delivery of this Agreement by
the Company do not, and the performance of this Agreement by the Company will
not, (i) conflict with or violate the Certificate of Incorporation or Bylaws of
the Company, (ii) conflict with or violate any law, rule, regulation, order,
judgment or decree applicable to the Company or by which its properties is bound
or affected or (iii) result in any breach of or constitute a default (or an
event that with notice or lapse of time or both would become a default) under,
or impair the Company's rights or alter the rights or obligations of any third
party under, or give to others any rights of termination, amendment,
acceleration or cancellation of, or result in the creation of a lien or
encumbrance on any of the properties or assets of the Company pursuant to, any
material note, bond, mortgage, indenture, contract, agreement, lease, license,
permit, franchise or other instrument or obligation to which the Company is a
party or by which the Company or its properties are bound or affected, except,
with respect to clauses (ii) and (iii), for any such conflicts, violations,
breaches, defaults or other occurrences that could not, individually and in the
aggregate, reasonably be expected to have a Material Adverse Effect on the
Company; and (G) the execution and delivery of this Agreement by the Company
does not, and the performance of this Agreement by the Company will not, require
any consent, approval, authorization or permit of, or filing with, or
notification to, any Governmental Entity except as disclosed in the Merger
Agreement and the disclosure schedule of the Company thereto.

         6. Certain Rights.

                (a) Silknet Put. At the request of and upon notice by Silknet
(the "Put Notice"), at any time during the period during which the Option is
exercisable pursuant to Section 2 (the "Purchase Period"), the Company (or any
successor entity thereof) shall be obligated to purchase from Silknet all or any
portion of the Option, to the extent not previously exercised, at the price set
forth in subparagraph (i) below (as limited by subparagraph (iii) below), and
all or any portion of the Option Shares, if any, acquired by Silknet pursuant
thereto, at the price set forth in subparagraph (ii) below (as limited by
subparagraph (iii) below):

                  (i) The difference between the Market/Tender Offer Price (as
defined below) for the Company Shares as of the date Silknet gives notice of its
intent to exercise its rights under this Section 6(a) and the Exercise Price,
multiplied by the number of Company Shares purchasable pursuant to the Option
(or portion thereof with respect to which Silknet is exercising its rights under
this Section 6), but only if the Market/Tender Offer Price is greater than the
Exercise Price. "Market/Tender Offer Price" shall mean the highest of (A) the
highest price per share offered pursuant to any Kana Takeover Proposal which was
made prior to such date and has not terminated or been withdrawn as of such date
and (B) the highest closing sale price of Company Shares as


                                       4

<PAGE>   5
reported on the Nasdaq National Market during the six (6) months ending on the
trading day immediately preceding such date. For purposes of determining the
highest price offered pursuant to any Kana Takeover Proposal which involves
consideration other than cash, the value of such consideration will be equal to
the higher of (x) if securities of the same class of the proponent of such Kana
Takeover Proposal as such consideration are traded on any national securities
exchange or by any registered securities association, a value based on the
closing sale price or closing asked price for such securities on their principal
trading market on such date and (y) the value ascribed to such consideration by
the proponent of such Kana Takeover Proposal, or if no such value is ascribed, a
value determined in good faith by the Board of Directors of the Company.

                  (ii) The Exercise Price paid by Silknet for Company Shares
acquired pursuant to the Option plus the difference between the Market/Tender
Offer Price and such Exercise Price (but only if the Market/Tender Offer Price
is greater than the Exercise Price) multiplied by the number of Company Shares
so purchased (provided that Silknet then has beneficial ownership of such
Company Shares).

                  (iii) The foregoing shall be subject to the limitations on
Total Profit set forth in Section 10.

         (b) Payment and Redelivery of Option or Shares. If Silknet exercises
its rights under Section 6(a), the Company will, within five (5) business days
after Silknet delivers a Put Notice pursuant to Section 6(a), pay the required
amount to Silknet in immediately available funds and Silknet will surrender to
the Company the certificates evidencing the Company Shares and the portion of
the Option purchased by Silknet pursuant thereto.

         7. Reserved.

         8. Adjustment Upon Changes in Capitalization; Rights Plans.

                (a) In the event of any change in the Company Shares by reason
of stock dividends, stock splits, reclassifications, reverse stock splits,
mergers (other than the Merger), recapitalizations, combinations, exchanges of
shares and the like, the type and number of shares or securities subject to the
Option and the Exercise Price will be adjusted appropriately, and proper
provision will be made in the agreements governing such transaction so that
Silknet will receive, upon exercise of the Option, the number and class of
shares or other securities or property that Silknet would have received in
respect of the Company Shares if the Option had been exercised immediately prior
to such event or the record date therefor, as applicable.

                (b) At any time during which the Option is exercisable, and at
any time after the Option is exercised (in whole or in part, if at all), the
Company will not amend (nor permit the amendment of) any current stockholder
rights plan of the Company or its subsidiaries nor adopt (nor permit the
adoption of) a new stockholders rights plan that contains provisions for the
distribution or exercise of rights thereunder as a result of Silknet or any
affiliate being the beneficial owner of shares of the Company by virtue of the
Option being exercisable or having been exercised (or as a result of
beneficially owning shares issuable in respect of any Option Shares).


                                       5
<PAGE>   6

         9. Restrictive Legends.

         Each certificate representing Option Shares issued to Silknet hereunder
will include a legend in substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY BE REOFFERED OR SOLD ONLY
IF SO REGISTERED OR IF AN EXEMPTION FROM SUCH REGISTRATION IS AVAILABLE. SUCH
SECURITIES ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH
IN THE STOCK OPTION AGREEMENT DATED AS OF FEBRUARY 6, 2000, A COPY OF WHICH MAY
BE OBTAINED FROM THE ISSUER.

         It is understood and agreed that (i) the reference to restrictions
arising under the Securities Act in the above legend will be removed by delivery
of substitute certificate(s) without such reference if such Option Shares have
been registered pursuant to the Securities Act, such Option Shares have been
sold in reliance on and in accordance with Rule 144 under the Securities Act or
Silknet has delivered to the Company a copy of a letter from the staff of the
SEC, or an opinion of counsel in form and substance reasonably satisfactory to
the Company, to the effect that such legend is not required for purposes of the
Securities Act and (ii) the reference to restrictions pursuant to this Agreement
in the above legend will be removed by delivery of substitute certificate(s)
without such reference if the Option Shares evidenced by certificate(s)
containing such reference have been sold or transferred in compliance with the
provisions of this Agreement under circumstances that do not require the
retention of such reference.

         10. Total Profit.

                (a) Notwithstanding any other provision of this Agreement, in no
event shall Net Company Payments (as hereinafter defined) exceed one hundred
forty-eight million three hundred thousand dollars ($148,300,000) and in no
event shall Total Silknet Profits (as hereinafter defined) exceed one hundred
eight-eight million three hundred thousand dollars ($188,300,000), and if Net
Company Payments or Total Silknet Profits otherwise would exceed such amounts,
Silknet, at its sole election, shall either (i) reduce the number of Company
Shares subject to this Option, (ii) deliver to the Company for cancellation
Option Shares previously purchased by Silknet (or other securities into which
such Option Shares are converted or exchanged), (iii) pay cash to the Company or
(iv) any combination thereof, so that Silknet's actually realized Net Company
Payments and Total Silknet Profit shall not exceed such amounts after taking
into account the foregoing actions.

                (b) As used herein, (i) the term "Net Company Payments" means
the aggregate amount (without duplication) of (A) the net cash amounts received
by Silknet from the Company pursuant to the Company's repurchase of the Option
or Option Shares pursuant to Section 6(a), less (in the case of the Option
Shares) Silknet's purchase price for such Option Shares, and (ii) the aggregate
amount actually received by Silknet from the Company (exclusive of attorneys'
fees and interest) pursuant to Section 8.03 of the Merger Agreement; and (ii)
the term "Total Silknet Profit" means the aggregate amount (without duplication)
of (A) the net cash amounts received by Silknet pursuant to the Company's
repurchase of the Option or Option Shares pursuant to Section 6(a), less


                                       6
<PAGE>   7

(in the case of the Option Shares) Silknet's purchase price for such Option
Shares, (B) the aggregate amount actually received by Silknet pursuant to
Section 8.03 of the Merger Agreement, and (C) the net cash amounts received by
Silknet pursuant to the sale of Option Shares (or securities into which such
shares are converted or exchanged) to any other unaffiliated third party, less
Silknet's purchase price for such Option Shares.

         11. Listing and HSR Filing.

         The Company, upon the request of Silknet, will promptly file an
application to list the Company Shares to be acquired upon exercise of the
Option for quotation on the Nasdaq National Market and will use its best efforts
to obtain approval of such listing as soon as practicable. Promptly after the
date hereof, each of the parties hereto will promptly file with the Federal
Trade Commission and the Antitrust Division of the United States Department of
Justice all required premerger notification and report forms and other documents
and exhibits required to be filed under the HSR Act to permit the acquisition of
the Company Shares subject to the Option at the earliest possible date.

         12. Miscellaneous.

                (a) Binding Effect. This Agreement will be binding upon and
inure to the benefit of the parties hereto and their respective successors and
permitted assigns. Nothing contained in this Agreement, express or implied, is
intended to confer upon any person other than the parties hereto and their
respective successors and permitted assigns any rights or remedies of any nature
whatsoever by reason of this Agreement. Except as expressly provided for in this
Agreement, neither this Agreement nor the rights or the obligations of either
party hereto are assignable, except by operation of law or with the written
consent of the other party.

                (b) Specific Performance. The parties hereto recognize and agree
that if for any reason any of the provisions of this Agreement are not performed
in accordance with their specific terms or are otherwise breached, immediate and
irreparable harm or injury would be caused for which money damages would not be
an adequate remedy. Accordingly, each party hereto agrees that in addition to
other remedies available, the other party hereto will be entitled to an
injunction restraining any violation or threatened violation of the provisions
of this Agreement or the right to enforce any of the covenants or agreements set
forth herein by specific performance. If any action will be brought in equity to
enforce the provisions of this Agreement, neither party hereto will allege, and
each party hereto hereby waives the defense, that there is an adequate remedy at
law.

                (c) Entire Agreement. This Agreement and the Merger Agreement
(including the exhibits thereto) constitute the entire agreement between the
parties hereto with respect to the subject matter hereof and supersede all other
prior agreements and understandings, both written and oral, between the parties
hereto with respect to the subject matter hereof, it being understood that the
Confidentiality Agreement shall continue in full force and effect until the
Closing under the Merger Agreement and shall survive any terminations thereof or
hereof.

                (d) Further Assurances. Each party hereto will execute and
deliver all such further documents and instruments and take all such further
action as may be necessary in order to consummate the transactions contemplated
hereby.


                                       7
<PAGE>   8

                (e) Validity. The invalidity or unenforceability of any
provision of this Agreement will not affect the validity or enforceability of
the other provisions of this Agreement, which will remain in full force and
effect. In the event any Governmental Entity of competent jurisdiction holds any
provision of this Agreement to be null, void or unenforceable, the parties
hereto will negotiate in good faith and will execute and deliver an amendment to
this Agreement in order, as nearly as possible, to effectuate, to the extent
permitted by law, the intent of the parties hereto with respect to such
provision.

                (f) Notices. All notices and other communications hereunder will
be in writing and will be deemed given if delivered personally or by commercial
delivery service, or sent via telecopy (receipt confirmed) to the parties at the
following addresses or telecopy numbers (or at such other address or telecopy
numbers for a party as will be specified by like notice):

         if to Silknet, to:

                  Silknet Software Inc.
                  50 Phillipe Cote Street
                  Manchester, NE  03101
                  Attention: Chief Executive Officer
                  Facsimile: (603) 6250428

         and with a copy to:

                  Testa, Hurwitz & Thibeault, LLP
                  Oliver Street Tower
                  125 High Street
                  Boston, MA  02110
                  Attention: John Hession, Esq.
                  Telephone: (617) 248-7000
                  Facsimile:  (617) 248-7100


         if to the Company, to:

                  Kana Communications, Inc.
                  740 Bay Road
                  Redwood City, CA  94063
                  Attention: Chief Executive Officer
                  Telephone: (650) 298-9282
                  Facsimile:  (650) 474-8501

         with a copy to:

                  Brobeck, Phleger & Harrison LLP
                  Two Embarcadero Road
                  2200 Geng Road
                  Palo Alto, CA  94303


                                       8
<PAGE>   9

                  Attention:  Warren T. Lazarow, Esq.
                              David A. Makarechian, Esq.
                  Telephone:  (650) 424-0160
                  Facsimile:  (650) 496-2885


                (g) Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware, regardless of
the laws that might otherwise govern under applicable principles of conflicts of
law thereof.

                (h) Expenses. Except as otherwise expressly provided herein or
in the Merger Agreement, all costs and expenses incurred in connection with the
transactions contemplated by this Agreement will be paid by the party incurring
such expenses.

                (i) Amendments; Waiver. This Agreement may be amended by the
parties hereto and the terms and conditions hereof may be waived only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver, by an instrument signed on behalf of the party waiving
compliance.

                (j) Assignment. Neither of the parties hereto may sell,
transfer, assign or otherwise dispose of any of its rights or obligations under
this Agreement or the Option created hereunder to any other person, without the
express prior written consent of the other party, except that the rights and
obligations hereunder will inure to the benefit of and be binding upon any
successor of a party hereto.

                (k) Counterparts. This Agreement may be executed in
counterparts, each of which will be deemed to be an original, but both of which,
taken together, will constitute one and the same instrument.

                (l) Descriptive Headings. The section headings are for
convenience only and shall not affect the construction or interpretation of this
Agreement.


                                       9
<PAGE>   10

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective duly authorized officers as of the date first above
written.


                                      KANA COMMUNICATIONS, INC.

                                        /s/ Michael J. McCloskey
                                      ________________________________________
                                      Name: Michael J. McCloskey
                                      Title: Chief Executive Officer


                                      SILKNET SOFTWARE, INC.

                                        /s/ James C. Wood
                                      ________________________________________
                                      Name: James C. Wood
                                      Title: Chairman of the Board,
                                             President and Chief
                                             Executive Officer


                                       10

<PAGE>   1

                                                                    EXHIBIT 99.3



                           KANA STOCK VOTING AGREEMENT

         THIS KANA STOCK VOTING AGREEMENT ("KANA STOCK VOTING AGREEMENT") is
made and entered into as of February 6, 2000 by and between Silknet Software
Inc., a Delaware corporation ("SILKNET"), and the undersigned director, officer
or affiliate (the "HOLDER") of Kana Communications, Inc., a Delaware corporation
("KANA").

                                    RECITALS

         Concurrently with the execution of this Kana Stock Voting Agreement,
Silknet, Pistol Acquisition Corp., a Delaware corporation and a wholly-owned
subsidiary of Kana ("SUB"), and Kana have entered into an Agreement and Plan of
Reorganization, dated as of February 6, 2000 (the "MERGER AGREEMENT") providing
for the merger of Sub with and into Silknet (the "MERGER"). As a result of the
Merger, which is intended to qualify as a reorganization within the meaning of
Section 368(a) of the Internal Revenue Code of 1986, as amended, Silknet will
become a wholly-owned subsidiary of Kana and stockholders of Silknet will become
stockholders of Kana. Holder is the holder of record and the beneficial owner
(as defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended
(the "EXCHANGE ACT")) of the number of shares of the capital stock of Kana
indicated on the signature page of this Kana Stock Voting Agreement (the
"SHARES"). As a condition to its execution and delivery of the Merger Agreement,
Silknet has requested that Holder agree, and in consideration, and to induce the
execution and delivery, of the Merger Agreement by Silknet, Holder is willing to
agree (i) not to transfer or otherwise dispose of the Shares or any other shares
of capital stock of Kana acquired after the date of this Kana Stock Agreement
and prior to the expiration of this Kana Stock Voting Agreement, except as
specifically permitted hereby, and (ii) to vote the Shares and any other such
shares of Kana stock so as to facilitate consummation of the Merger, as more
fully described below.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties agree as follows:

                                    AGREEMENT

         Section 1 No Transfer or Encumbrance of Shares. Holder agrees not to
sell, pledge, assign, encumber, dispose of or otherwise transfer (including by
merger, testamentary disposition, interspousal disposition pursuant to a
domestic relations proceeding or otherwise by operation of law) ("TRANSFER") any
of the Shares or any New Shares (as defined below), or to make any offer or
agreement relating thereto at any time prior to the expiration of this Kana
Stock Voting Agreement. The foregoing restrictions shall not prohibit a transfer
of shares or New Shares (i) in the case of an individual, to any member of his
immediate family, to a trust for the benefit of Holder or any member of his
immediate family or a transfer of Shares or New Shares upon the death of Holder,
(ii) in the case of a partnership or limited liability company, to one or more
partners or members or to an affiliated corporation, or (iii) which Holder can
not prevent (it being understood that Holder shall use his best efforts to
prevent transfers other than pursuant to (i) and (ii) hereof; provided, however,
that any transferee with respect to a transfer permitted under (i) or (ii)
shall, as a precondition to such transfer, agree in a writing delivered to

<PAGE>   2

Silknet, to be bound by the terms and conditions of this Kana Stock Voting
Agreement. This Kana Stock Voting Agreement shall expire on the earlier of (a)
the date and time on which the Merger shall become effective in accordance with
the terms of the Merger Agreement or (b) the date on which the Merger Agreement
shall be terminated pursuant to Section 8.01 of the Merger Agreement (the
"EXPIRATION DATE"). Holder agrees that any shares of capital stock of Kana that
Holder purchases or with respect to which Holder otherwise acquires beneficial
ownership after the date of this Kana Stock Voting Agreement and prior to the
Expiration Date ("NEW SHARES") shall be subject to the terms and conditions of
this Kana Stock Voting Agreement to the same extent as if such shares
constituted Shares.

         Section 2 Agreement to Vote Shares. Holder hereby agrees to appear, or,
using Holder's best efforts and to the full extent legally permitted, cause the
holder of record on any applicable record date to appear in person or by proxy
for the purpose of obtaining a quorum at any annual or special meeting of
stockholders of the Company and at any adjournment thereof at which matters
relating to the Merger, the Merger Agreement or any transaction contemplated
thereby are considered. At every meeting of the Kana stockholders called with
respect to any of the following, and at any adjournment thereof, Holder shall
vote or, using Holder's best efforts and to the full extent legally permitted,
cause the holder of record to vote the Shares and any New Shares (except those
Shares or New Shares which are not voting securities):

                  (a) in favor of approval of the issuance of shares of Kana
         stock pursuant to the Merger Agreement, and any proposal or action
         which would, or could reasonably be expected to, facilitate the Merger;

                  (b) against approval of any proposal made in opposition to or
         competition with consummation of the Merger and the Merger Agreement;

                  (c) against any merger, consolidation or other business
         combination of Kana with, sale of assets or stock of Kana to, or
         reorganization or recapitalization involving Kana, other than as
         contemplated or permitted by the Merger Agreement;

                  (d) against any liquidation, or winding up of Kana; and

                  (e) against any other proposal or action which would, or could
         reasonably be expected to, impede, frustrate, prevent, prohibit or
         discourage the Merger (each of (b) through (e) collectively, an
         "OPPOSING PROPOSAL").

Holder, as the holder of voting stock of Kana, shall be present, in person or by
proxy, or, using Holder's best efforts and to the full extent legally permitted,
cause the holder of record to be present, in person or by proxy, at all meetings
of stockholders of Kana so that all Shares and New Shares are counted for the
purposes of determining the presence of a quorum at such meetings. This Kana
Stock Voting Agreement is intended to bind Holder only with respect to the
specific matters set forth herein, and shall not prohibit Holder from acting in
accordance with Holder's fiduciary duties as an officer or director of Kana.

         Section 3 Option Exercise. Holder agrees that if, at any meeting of
stockholders of Kana called with respect to any of (a) through (e) of Section 2
hereof, the number of shares of


                                       2
<PAGE>   3

Kana's capital stock voting in accordance with (a) through (e) of Section 2
hereof shall not be enough to prevail in such vote, Holder will immediately
exercise any and all options and warrants, or otherwise convert or exercise any
securities, beneficially owned by him (to the full extent permitted by
applicable law) in order to vote all New Shares resulting from such exercise or
conversion in accordance with Section 2 hereof. Silknet hereby agrees that, in
the event Holder is required pursuant to this Section 3 to convert or exercise
any securities and upon request by Holder, Silknet will make a loan, evidenced
by a promissory note and on reasonable terms, to Holder (or any third party) in
the amount of any tax imposed on Holder (or such third party) solely as a result
of such conversion or exercise.

         Section 4 Irrevocable Proxy. Concurrently with the execution of this
Kana Stock Voting Agreement, Holder agrees to deliver to Silknet a proxy in the
form attached hereto as Annex A (the "PROXY"), which shall be irrevocable to the
extent provided therein; provided, however, that the Proxy shall be revoked upon
termination of this Kana Stock Voting Agreement in accordance with its terms.

         Section 5 Representations, Warranties and Covenants of Holder. Holder
hereby represents, warrants and covenants to Silknet as follows:

                  (a) Ownership of Shares. Holder (i) is the holder of record or
         beneficial owner or holder of the voting power of the Shares and will
         be the holder of record or beneficial owner or holder of the voting
         power of all New Shares, if any, which at the date hereof and at all
         times until the Expiration Date will be free and clear of any liens,
         claims, options, charges or other encumbrances that would interfere
         with the voting of the Shares or the granting of any proxy with respect
         thereto, (ii) does not beneficially own any shares of capital stock of
         Kana other than the Shares (except to the extent that Holder currently
         disclaims beneficial ownership in accordance with applicable law) and
         (iii) has full power and authority to make, enter into, deliver and
         carry out the terms of this Kana Stock Voting Agreement and the Proxy.

                  (b) No Voting Trusts and Agreements. Between the date of this
         Agreement and the Expiration Date, Holder will not, and will not permit
         any entity under Holder's control to, deposit any shares of Kana
         capital stock held by Holder or such entity in a voting trust or
         subject any shares of Kana capital stock held by such Holder or such
         entity to any arrangement or agreement with respect to the voting of
         such shares of capital stock, other than agreements entered into with
         Silknet.

                  (c) Validity; No Conflict. This Kana Stock Voting Agreement
         constitutes the legal, valid and binding obligation of Holder. Neither
         the execution of this Kana Stock Voting Agreement by Holder nor the
         consummation of the transactions contemplated herein will violate or
         result in a breach of (i) any provision of any trust, charter,
         partnership agreement or other charter document applicable to Holder,
         (ii) any agreement to which Holder is a party or by which Holder is
         bound, (iii) any decree, judgment or order to which Holder is subject,
         or (iv) any law or regulation now in effect applicable to Holder.


                                       3
<PAGE>   4

                  (d) No Proxy Solicitations. Subject to the last sentence of
         Section 2, between the date of this Agreement and the Expiration Date,
         Holder will not, and will not permit any entity under Holder's control,
         to (i) solicit proxies or become a "participant" in a "solicitation"
         (as such terms are defined in Rule 14A under the Exchange Act) with
         respect to an Opposing Proposal or otherwise encourage or assist any
         party in taking or planning any action which would compete with,
         restrain or otherwise serve to interfere with or inhibit the timely
         consummation of the Merger in accordance with the terms of the Merger
         Agreement, (ii) initiate a stockholders' vote with respect to an
         Opposing Proposal or (iii) become a member of a "group" (as such term
         is used in Section 13(d) of the Exchange Act) with respect to any
         voting securities of Kana with respect to an Opposing Proposal.

         Section 6 Representations, Warranties and Covenants of Silknet. Silknet
represents, warrants and covenants to Holder as follows:

                  (a) Due Authorization. This Kana Stock Voting Agreement has
         been authorized by all necessary corporate action on the part of
         Silknet and has been duly executed by a duly authorized officer of
         Silknet.

                  (b) Validity; No Conflict. This Kana Stock Voting Agreement
         constitutes the legal, valid and binding obligation of Silknet. Neither
         the execution of this Kana Stock Voting Agreement by Silknet nor the
         consummation of the transactions contemplated herein will violate or
         result in a breach of (i) any agreement to which Silknet is a party or
         by which Silknet is bound, (ii) any decree, judgment or order to which
         Silknet is subject, or (iii) any law or regulation now in effect
         applicable to Silknet.

         Section 7 Additional Documents. Holder and Silknet hereby covenant and
agree to execute and deliver any additional documents necessary or desirable, in
the reasonable opinion of Silknet's legal counsel or Holder, as the case may be,
to carry out the intent of this Kana Stock Voting Agreement.

         Section 8 Legending of Shares. Upon the request of Silknet, Holder
agrees that it shall forthwith surrender all certificates representing the
Shares so that they shall bear a conspicuous legend stating that they are
subject to this Agreement (and the restrictions on transfer provided for herein)
and to an Irrevocable Proxy. Subject to the terms of Section 2 hereof,
Stockholder agrees that it shall not Transfer the Shares without first having
the aforementioned legend affixed to the certificates representing the Shares.

         Section 9 Consent and Waiver. Holder hereby gives any consent or waiver
reasonably required for the consummation of the Merger under the terms of any
agreement to which Holder is a party.

         Section 10 Termination. Notwithstanding any other provision contained
herein, this Kana Stock Voting Agreement and the Proxy, and all obligations of
Holder hereunder and thereunder, shall terminate as of the Expiration Date.


                                       4
<PAGE>   5

         Section 11 No Solicitation.

                  (a) Until the earlier of the Effective Time (as defined in the
         Merger Agreement) or a valid termination of the Merger Agreement
         pursuant to Article VIII thereof, Holder will not, and will not
         authorize, direct or permit any of its officers, directors, employees,
         affiliates under its control, investment bankers, attorneys,
         accountants or other agents, advisors or representatives (collectively,
         "REPRESENTATIVES") to, directly or indirectly, (i) solicit, initiate,
         encourage or induce the making, submission or announcement of any Kana
         Takeover Proposal (as defined below), (ii) participate in any
         discussions or negotiations with any person regarding, or furnish to
         any person any information with respect to, or take any other action to
         facilitate any inquiry or proposal that constitutes or may reasonably
         be expected to lead to, any Kana Takeover Proposal, (iii) authorize,
         approve or recommend any Kana Takeover Proposal, or (iv) enter into any
         letter of intent or similar document or any contract, agreement or
         commitment accepting or providing for any Kana Takeover Proposal.

                  (b) Holder and Silknet agree that irreparable damage would
         occur in the event that the provisions of this Section 11 were not
         performed in accordance with their specific terms or were otherwise
         breached. It is accordingly agreed by the parties hereto that Silknet
         shall be entitled to seek an injunction or injunctions to prevent
         breaches of this Section 11 and to enforce specifically the terms and
         provisions hereof in any court of the United States or any state having
         jurisdiction, this being in addition to any other remedy to which the
         parties may be entitled at law or in equity.

                  (c) For purposes of this Agreement, "KANA TAKEOVER PROPOSAL"
         means any offer or proposal for, or any indication of interest in, a
         merger or other business combination involving an acquisition or a
         change in control of Kana or the acquisition of a majority of the
         outstanding shares of capital stock of Kana, or all or substantially
         all of the assets of Kana, or any other transaction inconsistent with
         consummation of the transactions contemplated hereby, which offer,
         proposal or indication of interest is conditioned on the termination of
         the Merger Agreement by Kana or the denial by Kana stockholders of the
         Kana Voting Proposal.

         Section 12 Confidentiality. Holder agrees (i) to hold any information
regarding this Agreement and the Merger in strict confidence and (ii) not to
divulge any such information to any third person, except to the extent any of
the same is hereafter publicly disclosed by Silknet.

         Section 13 Miscellaneous.

                  (a) Severability. If any term, provision, covenant or
         restriction of this Kana Stock Voting Agreement or the Proxy (i) is
         held by a court of competent jurisdiction to be invalid, void or
         unenforceable for any reason, or (ii) would preclude the Merger from
         qualifying as a reorganization within the meaning of Section 368(a) of
         the Internal Revenue Code of 1986, as amended, such term, provision,
         covenant or restriction shall be modified or voided, as may be
         necessary to achieve the intent of the parties to the extent possible,
         and the remainder of the terms, provisions, covenants and restrictions
         of this


                                       5
<PAGE>   6

         Kana Stock Voting Agreement shall remain in full force and effect and
         shall in no way be affected, impaired or invalidated.

                  (b) Binding Effect and Assignment. This Kana Stock Voting
         Agreement and all of the provisions hereof shall be binding upon and
         inure to the benefit of the parties hereto and their respective
         successors and permitted assigns, but, except as otherwise specifically
         provided herein, neither this Kana Stock Voting Agreement nor any of
         the rights, interests or obligations of the parties hereto may be
         assigned by either of the parties hereto without the prior written
         consent of the other, and any attempted assignment thereof without such
         consent shall be null and void.

                  (c) Amendments and Modifications. This Kana Stock Voting
         Agreement may not be modified, amended, altered or supplemented except
         upon the execution and delivery of a written agreement executed by the
         parties hereto.

                  (d) Specific Performance: Injunctive Relief. The parties
         hereto acknowledge that Silknet will be irreparably harmed by a breach
         of any of the covenants or agreements of Holder set forth herein and
         that there will be no adequate remedy at law for such a breach.
         Therefore, it is agreed that, in addition to any other remedies which
         may be available to Silknet upon such breach, Silknet shall have the
         right to enforce such covenants and agreements by specific performance,
         injunctive relief or by any other means available to it at law or in
         equity.

                  (e) Notices. All notices, requests, claims, demands and other
         communications hereunder shall be in writing and sufficient if
         delivered in person, by commercial overnight courier service, by
         confirmed telecopy, or sent by mail (registered or certified mail,
         postage prepaid, return receipt requested), to the respective parties
         as follows:

                  If to Silknet:      Silknet Software Inc.
                                      The Gateway Building
                                      50 Phillippe Cote Street
                                      Fax: (603) 625-0070
                                      Attention:  Chief Executive Officer

                  If to Holder:       To the address for notice set forth on
                                      the last page hereof.

                  With a copy to:     Kana Communications, Inc.
                                      740 Bay Road
                                      Redwood City, CA 94063
                                      Fax: (650) 474-8507
                                      Attention:  Chief Executive Officer

                  and to:             Brobeck, Phleger & Harrison LLP
                                      Two Embarcadero Place
                                      2200 Geng Road
                                      Palo Alto, CA 94303


                                       6
<PAGE>   7

                                      Fax: (650) 496-2885
                                      Attention: Warren T. Lazarow, Esq.
                                                 David A. Makarechian, Esq.

                  and to:             Brobeck, Phleger & Harrison LLP
                                      Two Embarcadero Place
                                      2200 Geng Road
                                      Palo Alto, CA 94303
                                      Fax: (650) 496-2777
                                      Attention: Rod J. Howard, Esq.


or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
only be effective upon receipt.

                  (f) Governing Law. This Kana Stock Voting Agreement shall be
         governed by, construed and enforced in accordance with the laws of the
         State of Delaware, without giving effect to principles of conflicts of
         law. Each party hereto irrevocably and unconditionally consents and
         submits to the jurisdiction of the courts of the State of Delaware and
         of the United States of America located in the State of Delaware for
         any actions, suits or proceedings arising out of or relating to this
         agreement and the transactions contemplated hereby.

                  (g) Entire Agreement. This Kana Stock Voting Agreement
         contains the entire understanding of the parties with respect to the
         subject matter hereof, and supersedes all prior negotiations and
         understandings between the parties with respect to such subject matter.

                  (h) Counterparts. This Kana Stock Voting Agreement may be
         executed in one or more counterparts, each of which shall be an
         original, but all of which together shall constitute one and the same
         instrument.

                  (i) Effect of Headings. The section headings contained herein
         are for convenience only and shall not affect the construction or
         interpretation of this Kana Stock Voting Agreement.

                  (j) Holder Capacity. Notwithstanding anything herein to the
         contrary, no person executing this Agreement who is, or becomes during
         the term hereof, a director of Silknet makes any agreement or
         understanding herein in his or her capacity as such director, and the
         agreements set forth herein shall in no way restrict any director in
         the exercise of his or her fiduciary duties as a director of Silknet.
         Holder has executed this Agreement solely in his or her capacity as the
         record or beneficial holder of such Holder's Shares or as the trustee
         of a trust whose beneficiaries are the beneficial owners of such
         Holder's Shares.


                                       7
<PAGE>   8

         IN WITNESS WHEREOF, the parties have caused this Kana Stock Voting
Agreement to be duly executed on the day and year first above written.


                                         SILKNET SOFTWARE INC.

                                         By: /s/ James C. Wood
                                             ----------------------
                                         Its: Chairman of the Board,
                                              President and Chief
                                              Executive Officer

                    [SIGNATURE PAGE TO STOCK VOTING AGREEMENT

<PAGE>   9

                                         HOLDER

                                         By: __________________________________

                                         Holder's Address for Notice:

                                         ______________________________________

                                         ______________________________________

                                         ______________________________________


                                         Number of Shares owned beneficially:

                                         ______________________________________

                                         Number of Shares owned of record (if
                                         different from above):

                                         ______________________________________


                    [SIGNATURE PAGE TO STOCK VOTING AGREEMENT]

<PAGE>   10

                                     ANNEX A

                                IRREVOCABLE PROXY

         The undersigned stockholder of Kana Communications, Inc., a Delaware
corporation ("KANA"), hereby irrevocably appoints and constitutes the members of
the Board of Directors of Silknet Software Inc., a Delaware corporation
("SILKNET"), and each of them (the "PROXYHOLDERS"), the agents and proxies of
the undersigned, with full power of substitution and resubstitution, to the full
extent of the undersigned's rights with respect to the shares of capital stock
of Kana beneficially owned by the undersigned, which shares are listed below and
any and all other shares or securities issued or issuable in respect thereof, or
which the undersigned otherwise acquires, on or after the date hereof and prior
to the date this proxy terminates (collectively, the "SHARES"), to vote the
Shares (except those Shares which are not voting securities at the time of the
vote, or are not converted into voting securities at the time of a vote) as
follows:

         The agents and proxies named above are empowered at any time prior to
         termination of this proxy to exercise all voting and other rights
         (including, without limitation, the power to execute and deliver
         written consents with respect to the Shares) of the undersigned at
         every annual, special or adjourned meeting of Kana stockholders, and in
         every written consent in lieu of such a meeting, or otherwise,

                  (a) in favor of (i) the issuance of shares of Kana stock
         pursuant to the Agreement and Plan of Reorganization by and among Kana,
         Pistol Acquisition Corp. ("SUB"), and Silknet, dated as of February 6,
         2000, as the same may be amended from time to time (the "MERGER
         AGREEMENT"), and (ii) any proposal or action which would or could
         reasonably be expected to facilitate the merger of Sub with and into
         Silknet pursuant to the Merger Agreement (the "MERGER");

                  (b) against approval of any proposal made in opposition to or
         competition with consummation of the Merger and the Merger Agreement;

                  (c) against any merger, consolidation or other business
         combination of Kana with, sale of assets or stock of Kana to, or
         reorganization or recapitalization involving Kana, other than as
         contemplated or permitted by the Merger Agreement;

                  (d) against any liquidation, or winding up of Kana; and

                  (e) against any other proposal or action which would, or could
         reasonably be expected to, prohibit or discourage the Merger.

The Proxyholders may not exercise this proxy with respect to any other matter.
The undersigned may vote the Shares on all such other matters.

         The proxy granted by the undersigned to the Proxyholders hereby is
granted as of the date of this Irrevocable Proxy in order to secure the
obligations of the undersigned set forth in

<PAGE>   11

Section 2 of the Kana Stock Voting Agreement, and is irrevocable and coupled
with an interest in such obligations and in the interests in Kana to be
purchased and sold pursuant the Merger Agreement. This proxy will terminate upon
the termination of the Kana Stock Voting Agreement in accordance with its terms.

         Upon the execution hereof, all prior proxies given by the undersigned
with respect to the Shares are hereby revoked, and no subsequent proxies will be
given with respect to the Shares until such time as this proxy shall be
terminated in accordance with its terms.

         Any obligation of the undersigned hereunder shall be binding upon the
successors and assigns of the undersigned. The undersigned authorizes the
Proxyholders to file this proxy and any substitution or revocation of
substitution with the Secretary of Kana and with any Inspector of Elections at
any meeting of the stockholders of Kana.


                                       2
<PAGE>   12

         This proxy is irrevocable and shall survive the insolvency, incapacity,
death or liquidation of the undersigned.

         Dated: February __, 2000.

         Name of Stockholder:                        __________________________

         Signature of Stockholder:                   __________________________

         Shares beneficially owned by Stockholder:   __________________________

         Shares owned of record by Stockholder:      __________________________


                      [SIGNATURE PAGE TO IRREVOCABLE PROXY]



<PAGE>   1

                                                                   EXHIBIT 99.4

                                                                 EXECUTION COPY

                         SILKNET STOCK OPTION AGREEMENT

     THIS SILKNET STOCK OPTION AGREEMENT (this "AGREEMENT") is made and entered
into as of February 6, 2000, between Kana Communications, Inc., a Delaware
corporation ("KANA"), and Silknet Software Inc., a Delaware corporation (the
"COMPANY"). Capitalized terms used but not otherwise defined herein have the
meanings ascribed to them in the Merger Agreement (as defined below).

                                    RECITALS

     A. Concurrently with the execution and delivery of this Agreement, Kana,
Merger Sub (as defined below) and the Company are entering into an Agreement and
Plan of Merger (the "MERGER AGREEMENT") that provides for the merger of a
wholly-owned subsidiary of Kana ("MERGER SUB") with and into the Company (the
"MERGER"). Pursuant to the Merger, each share of common stock, par value $0.01
per share, of the Company ("COMPANY SHARES") outstanding at the Effective Time
of the Merger will be converted into the right to receive common stock, par
value $0.001 per share, of Kana, upon the terms and subject to the conditions
and exceptions set forth in the Merger Agreement.

     B. As a condition to Kana's willingness to enter into the Merger Agreement,
Kana has required that the Company agree, and the Company has so agreed, to
grant to Kana an option to acquire Company Shares upon the terms and subject to
the conditions set forth herein.

     NOW, THEREFORE, in consideration of the foregoing and of the mutual
covenants and agreements set forth herein and in the Merger Agreement and for
other good and valuable consideration, the receipt and adequacy of which are
hereby acknowledged, the parties hereto agree as follows:

     1. GRANT OF OPTION.

     The Company hereby grants to Kana an irrevocable option (the "OPTION") to
purchase from the Company up to the number of fully paid and nonassessable
Company Shares equal to nineteen and nine tenths percent (19.9%) of the Company
Shares issued and outstanding at the time of exercise of the Option (the "OPTION
SHARES"), in the manner set forth below by paying cash to the Company at a price
of two hundred fourteen dollars and eighty-seven cents ($214.87) per Company
Share (the "EXERCISE PRICE").

     2. EXERCISE OF OPTION.

     (a) The Option may be exercised by Kana, in whole or in part, at any time
or from time to time on or after the occurrence of an Exercise Event. The
Company shall notify Kana promptly in writing of the occurrence of any Exercise
Event, it being understood that the giving of such notice by the Company shall
not be a condition to the right of Kana to exercise the option. For all purposes
of this Agreement, an "EXERCISE EVENT" shall mean the occurrence of any of (i) a
Triggering Event (as defined below), (ii) the public announcement of an
Acquisition Proposal (as defined below), or (iii) the commencement of a
solicitation within the meaning of Rule 14a-1(1) by

<PAGE>   2

any person or entity other than the Company or its Board of Directors (or any
person or entity acting on behalf of the Company or its Board of Directors)
seeking to alter the composition of the Company's Board of Directors. If Kana
wishes to exercise the Option, Kana will deliver to the Company a written notice
(each an "EXERCISE NOTICE") specifying the total number of Option Shares it
wishes to acquire. Each closing of a purchase of Option Shares (a "CLOSING")
will occur on a date and at a time prior to the termination of the Option
designated by Kana in an Exercise Notice delivered at least two (2) business
days prior to the date of such Closing, which Closing will be held at the
principal offices of the Company.

          (i) For purposes of this Agreement, "ACQUISITION PROPOSAL" shall mean
any offer or proposal (other than by Kana) for any transaction or series of
related transactions involving: (A) any purchase from the Company or acquisition
by any person or "group" (as defined in Section 13(d) of the Exchange Act and
the rules and regulations thereunder) of more than a ten percent (10%) interest
in the total outstanding voting securities of the Company or any of its
subsidiaries or any tender offer or exchange offer that if consummated would
result in any person or group beneficially owning ten percent (10%) or more of
the total outstanding voting securities of the Company or any of its
subsidiaries or any merger, consolidation, business combination or similar
transaction involving the Company; (B) any sale, lease (other than in the
ordinary course of business), exchange, transfer, license (other than in the
ordinary course of business), acquisition or disposition of more than ten
percent (10%) of the assets of the Company; or (C) any liquidation or
dissolution of the Company.

          (ii) For purposes of this Agreement, a "TRIGGERING EVENT" shall be
deemed to have occurred if: (i) the Board of Directors of the Company or any
committee thereof shall for any reason have withdrawn or shall have amended or
modified in a manner adverse to Kana its recommendation in favor of the approval
and adoption of the Merger Agreement and approval of the Merger; (ii) the
Company shall have failed to include in the Joint Proxy Statement/Prospectus the
recommendation of the Board of Directors of the Company in favor of the approval
and adoption of the Merger Agreement and the Merger; (iii) the Board of
Directors of the Company shall have failed to reaffirm its recommendation in
favor of the approval and adoption of the Merger Agreement and the Merger within
ten (10) business days after Kana requests in writing that such recommendation
be reaffirmed at any time following the making, announcement or submission of a
Silknet Takeover Proposal (as such term is defined in the Merger Agreement); or
(iv) a tender or exchange offer relating to securities of the Company shall have
been commenced by a person unaffiliated with the Company and the Company shall
not have sent to its security holders pursuant to Rule 14e-2 promulgated under
the Securities Act, within ten (10) business days after such tender or exchange
offer is first published sent or given, a statement disclosing that the Company
recommends rejection of such tender or exchange offer.

     (b) The Option and this Agreement will terminate upon the earliest of (i)
the Effective Time, (ii) termination of the Merger Agreement pursuant to SECTION
8.01(a) thereof, (iii) termination of the Merger Agreement pursuant to SECTION
801(e)(i) or 8.01(f)(i) thereof or otherwise under circumstances which cannot
give rise to a termination fee under SECTION 8.03(b) of the Merger Agreement if
prior thereto no Exercise Event shall have occurred or (iv) twelve (12) months
following the termination of the Merger Agreement under any other circumstances;
PROVIDED, HOWEVER, that if the Option cannot be exercised by reason of any
applicable judgment, decree, order, law or regulation (including, without
limitation, if the waiting period related to the

                                       2


<PAGE>   3

issuance of the Option Shares under the HSR Act shall not have expired or been
terminated), then the Option will not terminate until the forty fifth (45th)
business day after such impediment to exercise will have been removed or will
have become final and not subject to appeal. In addition, the period for the
exercise of the Option shall be extended to the extent necessary to avoid
liability under Section 16(b) of the Securities Exchange Act of 1934, as
amended, and the rules and regulations of the Securities and Exchange Commission
thereunder, by reason of such exercise.

     3. CONDITIONS TO CLOSING.

     The obligation of the Company to issue Option Shares to Kana hereunder is
subject to the conditions that (A) any waiting period under the HSR Act
applicable to the issuance of the Option Shares hereunder shall have expired or
been terminated; (B) all material consents, approvals, orders or authorizations
of, or registrations, declarations or filings with, any United States Federal,
state or local administrative agency or commission or other United States
Federal state or local governmental authority or instrumentality, if any,
required in connection with the issuance of the Option Shares hereunder shall
have been obtained or made, as the case may be; and (C) no preliminary or
permanent injunction or other order by any court of competent jurisdiction or
other Governmental Entity in the United States prohibiting or otherwise
restraining such issuance shall be in effect. It is understood and agreed that
at any time during which the Option is exercisable, the parties will use their
respective best efforts to satisfy all conditions to Closing, so that a Closing
may take place as promptly as practicable.

     4. CLOSING.

     At any Closing, (A) the Company will deliver to Kana a single certificate
in definitive form representing the number of Company Shares designated by Kana
in its Exercise Notice, such certificate to be registered in the name of Kana
and to bear the restrictive legend set forth in Section 9 hereof, against
delivery of (B) payment by Kana to the Company of the aggregate purchase price
for the Company Shares so designated and being purchased by wire transfer of
immediately available funds to an account designated by the Company, provided
that failure or refusal of the Company to designate such an account shall not
preclude Kana from exercising the Option. Upon delivery of an Exercise Notice
and the tender of the aggregate purchase price in immediately available funds,
Kana shall be deemed to be the holder of record of the Option Shares issuable
upon such exercise, notwithstanding that the stock transfer books of the Company
shall then be closed or that certificates representing such Company Shares shall
not be actually delivered to Kana.

     5. REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

     The Company represents and warrants to Kana that (A) the Company is a
corporation duly incorporated, validly existing and in good standing under the
laws of the State of Delaware and has the corporate power and authority to enter
into this Agreement and to carry out its obligations hereunder; (B) the
execution and delivery of this Agreement by the Company and consummation by the
Company of the transactions contemplated hereby have been duly authorized by all
necessary corporate action on the part of the Company and no other corporate
proceedings on the part of the Company are necessary to authorize this Agreement
or any of the transactions contemplated hereby; (C) this Agreement has been duly
executed and delivered by the Company and constitutes a legal, valid and binding
obligation of the Company enforceable against the

                                       3
<PAGE>   4


Company in accordance with its terms; (D) the Company has taken all necessary
corporate and other action to authorize and reserve for issuance and to permit
it to issue upon exercise of the Option, and at all times from the date hereof
until the termination of the Option will have reserved for issuance, a
sufficient number of unissued Company Shares for Kana to exercise the Option in
full and will take all necessary corporate or other action to authorize and
reserve for issuance all additional Company Shares or other securities which may
be issuable pursuant to Section 8(a) upon exercise of the Option, all of which,
upon their issuance and delivery in accordance with the terms of this Agreement,
will be validly issued, fully paid and nonassessable; (E) upon delivery of the
Company Shares and any other securities to Kana upon exercise of the Option,
Kana will acquire such Company Shares or other securities free and clear of all
material claims, liens, charges, encumbrances and security interests of any kind
or nature whatsoever; (F) the execution and delivery of this Agreement by the
Company do not, and the performance of this Agreement by the Company will not,
(i) conflict with or violate the Certificate of Incorporation or Bylaws of the
Company, (ii) conflict with or violate any law, rule, regulation, order,
judgment or decree applicable to the Company or by which its properties is bound
or affected or (iii) result in any breach of or constitute a default (or an
event that with notice or lapse of time or both would become a default) under,
or impair the Company's rights or alter the rights or obligations of any third
party under, or give to others any rights of termination, amendment,
acceleration or cancellation of, or result in the creation of a lien or
encumbrance on any of the properties or assets of the Company pursuant to, any
material note, bond, mortgage, indenture, contract, agreement, lease, license,
permit, franchise or other instrument or obligation to which the Company is a
party or by which the Company or its properties are bound or affected, except,
with respect to clauses (ii) and (iii), for any such conflicts, violations,
breaches, defaults or other occurrences that could not, individually and in the
aggregate, reasonably be expected to have a Material Adverse Effect on the
Company; and (G) the execution and delivery of this Agreement by the Company
does not, and the performance of this Agreement by the Company will not, require
any consent, approval, authorization or permit of, or filing with, or
notification to, any Governmental Entity except as disclosed in the Merger
Agreement and the disclosure schedule of the Company thereto.

     6. CERTAIN RIGHTS.

     (a) KANA PUT. At the request of and upon notice by Kana (the "PUT NOTICE"),
at any time during the period during which the Option is exercisable pursuant to
SECTION 2 (the "PURCHASE PERIOD"), the Company (or any successor entity thereof)
shall be obligated to purchase from Kana all or any portion of the Option, to
the extent not previously exercised, at the price set forth in subparagraph (i)
below (as limited by subparagraph (iii) below), and all or any portion of the
Option Shares, if any, acquired by Kana pursuant thereto, at the price set forth
in subparagraph (ii) below (as limited by subparagraph (iii) below):

          (i) The difference between the Market/Tender Offer Price (as defined
below) for the Company Shares as of the date Kana gives notice of its intent to
exercise its rights under this SECTION 6(a) and the Exercise Price, multiplied
by the number of Company Shares purchasable pursuant to the Option (or portion
thereof with respect to which Kana is exercising its rights under this SECTION
6), but only if the Market/Tender Offer Price is greater than the Exercise
Price. "MARKET/TENDER OFFER PRICE" shall mean the highest of (A) the highest
price per share offered pursuant to any Silknet Takeover Proposal which was made
prior to such date and has not terminated or been withdrawn as of such date and
(B) the highest closing sale price of Company

                                       4

<PAGE>   5

Shares as reported on the Nasdaq National Market during the six (6) months
ending on the trading day immediately preceding such date. For purposes of
determining the highest price offered pursuant to any Silknet Takeover Proposal
which involves consideration other than cash, the value of such consideration
will be equal to the higher of (x) if securities of the same class of the
proponent of such Silknet Takeover Proposal as such consideration are traded on
any national securities exchange or by any registered securities association, a
value based on the closing sale price or closing asked price for such securities
on their principal trading market on such date and (y) the value ascribed to
such consideration by the proponent of such Silknet Takeover Proposal, or if no
such value is ascribed, a value determined in good faith by the Board of
Directors of the Company.

          (ii) The Exercise Price paid by Kana for Company Shares acquired
pursuant to the Option plus the difference between the Market/Tender Offer Price
and such Exercise Price (but only if the Market/Tender Offer Price is greater
than the Exercise Price) multiplied by the number of Company Shares so purchased
(provided that Kana then has beneficial ownership of such Company Shares).

          (iii) The foregoing shall be subject to the limitations on Total
Profit set forth in


SECTION 10.

     (b) PAYMENT AND REDELIVERY OF OPTION OR SHARES. If Kana exercises its
rights under SECTION 6(a), the Company will, within five (5) business days after
Kana delivers a Put Notice pursuant to SECTION 6(a), pay the required amount to
Kana in immediately available funds and Kana will surrender to the Company the
certificates evidencing the Company Shares and the portion of the Option
purchased by Kana pursuant thereto.

     7. RESERVED.

     8. ADJUSTMENT UPON CHANGES IN CAPITALIZATION; RIGHTS PLANS.

     (a) In the event of any change in the Company Shares by reason of stock
dividends, stock splits, reclassifications, reverse stock splits, mergers (other
than the Merger), recapitalizations, combinations, exchanges of shares and the
like, the type and number of shares or securities subject to the Option and the
Exercise Price will be adjusted appropriately, and proper provision will be made
in the agreements governing such transaction so that Kana will receive, upon
exercise of the Option, the number and class of shares or other securities or
property that Kana would have received in respect of the Company Shares if the
Option had been exercised immediately prior to such event or the record date
therefor, as applicable.

     (b) At any time during which the Option is exercisable, and at any time
after the Option is exercised (in whole or in part, if at all), the Company will
not amend (nor permit the amendment of) any current stockholder rights plan of
the Company or its subsidiaries nor adopt (nor permit the adoption of) a new
stockholders rights plan that contains provisions for the distribution or
exercise of rights thereunder as a result of Kana or any affiliate being the
beneficial owner of shares of the Company by virtue of the Option being
exercisable or having been exercised (or as a result of beneficially owning
shares issuable in respect of any Option Shares).

                                       5

<PAGE>   6

     9. RESTRICTIVE LEGENDS.

     Each certificate representing Option Shares issued to Kana hereunder will
include a legend in substantially the following form:

     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY BE REOFFERED OR SOLD ONLY
IF SO REGISTERED OR IF AN EXEMPTION FROM SUCH REGISTRATION IS AVAILABLE. SUCH
SECURITIES ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH
IN THE STOCK OPTION AGREEMENT DATED AS OF FEBRUARY 6, 2000, A COPY OF WHICH MAY
BE OBTAINED FROM THE ISSUER.

     It is understood and agreed that (i) the reference to restrictions arising
under the Securities Act in the above legend will be removed by delivery of
substitute certificate(s) without such reference if such Option Shares have been
registered pursuant to the Securities Act, such Option Shares have been sold in
reliance on and in accordance with Rule 144 under the Securities Act or Kana has
delivered to the Company a copy of a letter from the staff of the SEC, or an
opinion of counsel in form and substance reasonably satisfactory to the Company,
to the effect that such legend is not required for purposes of the Securities
Act and (ii) the reference to restrictions pursuant to this Agreement in the
above legend will be removed by delivery of substitute certificate(s) without
such reference if the Option Shares evidenced by certificate(s) containing such
reference have been sold or transferred in compliance with the provisions of
this Agreement under circumstances that do not require the retention of such
reference.

     10. TOTAL PROFIT.

     (a) Notwithstanding any other provision of this Agreement, in no event
shall Net Company Payments (as hereinafter defined) exceed one hundred
forty-eight million three hundred thousand dollars ($148,300,000) and in no
event shall Total Kana Profits (as hereinafter defined) exceed one hundred
eighty-eight million three hundred thousand dollars ($188,300,000), and if Net
Company Payments or Total Kana Profits otherwise would exceed such amounts,
Kana, at its sole election, shall either (i) reduce the number of Company Shares
subject to this Option, (ii) deliver to the Company for cancellation Option
Shares previously purchased by Kana (or other securities into which such Option
Shares are converted or exchanged), (iii) pay cash to the Company or (iv) any
combination thereof, so that Kana's actually realized Net Company Payments and
Total Kana Profit shall not exceed such amounts after taking into account the
foregoing actions.

     (b) As used herein, (i) the term "NET COMPANY PAYMENTS" means the aggregate
amount (without duplication) of (A) the net cash amounts received by Kana from
the Company pursuant to the Company's repurchase of the Option or Option Shares
pursuant to SECTION 6(a), less (in the case of the Option Shares) Kana's
purchase price for such Option Shares, and (ii) the aggregate amount actually
received by Kana from the Company (exclusive of attorneys' fees and interest)
pursuant to Section 8.03 of the Merger Agreement; and (ii) the term "TOTAL KANA
PROFIT" means the aggregate amount (without duplication) of (A) the net cash
amounts received by Kana pursuant to the Company's repurchase of the Option or
Option Shares pursuant to SECTION 6(a), less (in the case of the Option Shares)
Kana's purchase price for such Option Shares, (B) the aggregate

                                       6

<PAGE>   7

amount actually received by Kana pursuant to Section 8.03 of the Merger
Agreement, and (C) the net cash amounts received by Kana pursuant to the sale of
Option Shares (or securities into which such shares are converted or exchanged)
to any other unaffiliated third party, less Kana's purchase price for such
Option Shares.

     11. LISTING AND HSR FILING.

     The Company, upon the request of Kana, will promptly file an application to
list the Company Shares to be acquired upon exercise of the Option for quotation
on the Nasdaq National Market and will use its best efforts to obtain approval
of such listing as soon as practicable. Promptly after the date hereof, each of
the parties hereto will promptly file with the Federal Trade Commission and the
Antitrust Division of the United States Department of Justice all required
premerger notification and report forms and other documents and exhibits
required to be filed under the HSR Act to permit the acquisition of the Company
Shares subject to the Option at the earliest possible date.

     12. MISCELLANEOUS.

     (a) BINDING EFFECT. This Agreement will be binding upon and inure to the
benefit of the parties hereto and their respective successors and permitted
assigns. Nothing contained in this Agreement, express or implied, is intended to
confer upon any person other than the parties hereto and their respective
successors and permitted assigns any rights or remedies of any nature whatsoever
by reason of this Agreement. Except as expressly provided for in this Agreement,
neither this Agreement nor the rights or the obligations of either party hereto
are assignable, except by operation of law or with the written consent of the
other party.

     (b) SPECIFIC PERFORMANCE. The parties hereto recognize and agree that if
for any reason any of the provisions of this Agreement are not performed in
accordance with their specific terms or are otherwise breached, immediate and
irreparable harm or injury would be caused for which money damages would not be
an adequate remedy. Accordingly, each party hereto agrees that in addition to
other remedies available, the other party hereto will be entitled to an
injunction restraining any violation or threatened violation of the provisions
of this Agreement or the right to enforce any of the covenants or agreements set
forth herein by specific performance. If any action will be brought in equity to
enforce the provisions of this Agreement, neither party hereto will allege, and
each party hereto hereby waives the defense, that there is an adequate remedy at
law.

     (c) ENTIRE AGREEMENT. This Agreement and the Merger Agreement (including
the exhibits thereto) constitute the entire agreement between the parties hereto
with respect to the subject matter hereof and supersede all other prior
agreements and understandings, both written and oral, between the parties hereto
with respect to the subject matter hereof, it being understood that the
Confidentiality Agreement shall continue in full force and effect until the
Closing under the Merger Agreement and shall survive any terminations thereof or
hereof.

     (d) FURTHER ASSURANCES. Each party hereto will execute and deliver all such
further documents and instruments and take all such further action as may be
necessary in order to consummate the transactions contemplated hereby.

                                       7

<PAGE>   8


     (e) VALIDITY. The invalidity or unenforceability of any provision of this
Agreement will not affect the validity or enforceability of the other provisions
of this Agreement, which will remain in full force and effect. In the event any
Governmental Entity of competent jurisdiction holds any provision of this
Agreement to be null, void or unenforceable, the parties hereto will negotiate
in good faith and will execute and deliver an amendment to this Agreement in
order, as nearly as possible, to effectuate, to the extent permitted by law, the
intent of the parties hereto with respect to such provision.

     (f) NOTICES. All notices and other communications hereunder will be in
writing and will be deemed given if delivered personally or by commercial
delivery service, or sent via telecopy (receipt confirmed) to the parties at the
following addresses or telecopy numbers (or at such other address or telecopy
numbers for a party as will be specified by like notice):

         if to Kana, to:

                  Kana Communications, Inc.
                  740 Bay Road
                  Redwood City, CA  94063
                  Attention: Chief Executive Officer
                  Telephone: (650) 298-9282
                  Facsimile:  (650) 474-8501

         with a copy to:

                  Brobeck, Phleger & Harrison LLP
                  Two Embarcadero Road
                  2200 Geng Road
                  Palo Alto, CA  94303
                  Attention:  Warren T. Lazarow, Esq.

                                 David A. Makarechian, Esq.
                  Telephone: (650) 424-0160
                  Facsimile:  (650) 496-2885

         if to the Company, to:

                  Silknet Software Inc.
                  50 Phillipe Cote Street
                  Manchester, NE  03101
                  Attention: Chief Executive Officer
                  Facsimile: (603) 6250428

         and with a copy to:

                  Testa, Hurwitz & Thibeault, LLP
                  Oliver Street Tower
                  125 High Street
                  Boston, MA  02110

                                       8

<PAGE>   9
                  Attention: John Hession, Esq.
                  Telephone: (617) 248-7000
                  Facsimile:  (617) 248-7100

     (g) GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of law thereof.

     (h) EXPENSES. Except as otherwise expressly provided herein or in the
Merger Agreement, all costs and expenses incurred in connection with the
transactions contemplated by this Agreement will be paid by the party incurring
such expenses.

     (i) AMENDMENTS; WAIVER. This Agreement may be amended by the parties hereto
and the terms and conditions hereof may be waived only by an instrument in
writing signed on behalf of each of the parties hereto, or, in the case of a
waiver, by an instrument signed on behalf of the party waiving compliance.

     (j) ASSIGNMENT. Neither of the parties hereto may sell, transfer, assign or
otherwise dispose of any of its rights or obligations under this Agreement or
the Option created hereunder to any other person, without the express prior
written consent of the other party, except that the rights and obligations
hereunder will inure to the benefit of and be binding upon any successor of a
party hereto.

     (k) COUNTERPARTS. This Agreement may be executed in counterparts, each of
which will be deemed to be an original, but both of which, taken together, will
constitute one and the same instrument.

     (l) DESCRIPTIVE HEADINGS. The section headings are for convenience only and
shall not affect the construction or interpretation of this Agreement.

                                       9

<PAGE>   10

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective duly authorized officers as of the date first above
written.

                                      KANA COMMUNICATIONS, INC.


                                      -----------------------------------
                                      Name:
                                      Title:



                                      SILKNET SOFTWARE INC.


                                      ------------------------------------
                                      Name:
                                      Title:



                                       10

<PAGE>   1

                                                                    EXHIBIT 99.5

                                                                  EXECUTION COPY


                         SILKNET STOCK VOTING AGREEMENT

     THIS SILKNET STOCK VOTING AGREEMENT ("SILKNET STOCK VOTING AGREEMENT") is
made and entered into as of February 6, 2000 by and between Kana Communications,
Inc., a Delaware corporation ("KANA"), and the undersigned director, officer or
affiliate (the "HOLDER") of Silknet Software Inc., a Delaware corporation
("SILKNET").

                                    RECITALS

     Concurrently with the execution of this Silknet Stock Voting Agreement,
Kana, Pistol Acquisition Corp., a Delaware corporation and a wholly-owned
subsidiary of Kana ("SUB"), and Silknet have entered into an Agreement and Plan
of Reorganization, dated as of February 6, 2000 (the "MERGER AGREEMENT")
providing for the merger of Sub with and into Silknet (the "MERGER"). As a
result of the Merger, which is intended to qualify as a reorganization within
the meaning of Section 368(a) of the Internal Revenue Code of 1986, as amended,
Silknet will become a wholly-owned subsidiary of Kana and stockholders of
Silknet will become stockholders of Kana. Holder is the holder of record and the
beneficial owner (as defined in Rule 13d-3 under the Securities Exchange Act of
1934, as amended, (the "EXCHANGE ACT")) of the number of shares of the capital
stock of Silknet indicated on the signature page of this Silknet Stock Voting
Agreement (the "SHARES"). As a condition to its execution and delivery of the
Merger Agreement, Kana has requested that Holder agree, and in consideration,
and to induce the execution and delivery, of the Merger Agreement by Kana,
Holder is willing to agree (i) not to transfer or otherwise dispose of the
Shares or any other shares of capital stock of Silknet acquired after the date
of this Silknet Stock Agreement and prior to the expiration of this Silknet
Stock Voting Agreement, except as specifically permitted hereby, and (ii) to
vote the Shares and any other such shares of Silknet stock so as to facilitate
consummation of the Merger, as more fully described below.

     NOW, THEREFORE, in consideration of the mutual covenants and agreements
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties agree as follows:

                                    AGREEMENT

     Section 1    NO TRANSFER OR ENCUMBRANCE OF SHARES. Holder agrees not to
sell, pledge, assign, encumber, dispose of or otherwise transfer (including by
merger, testamentary disposition, interspousal disposition pursuant to a
domestic relations proceeding or otherwise by operation of law) ("TRANSFER") any
of the Shares or any New Shares (as defined below), or to make any offer or
agreement relating thereto at any time prior to the expiration of this Silknet
Stock Voting Agreement. The foregoing restrictions shall not prohibit a transfer
of Shares or New Shares (i) in the case of an individual, to any member of his
immediate family, to a trust for the benefit of Holder or any member of his
immediate family or a transfer of Shares or New Shares upon the death of Holder,
(ii) in the case of a partnership or limited liability company, to one or more
partners or members or to an affiliated corporation or (iii) which Holder can
not prevent (it being understood that Holder shall use his best efforts to
prevent transfers other than pursuant to (i) or (ii) hereof); provided, however,
that any transferee with respect to a transfer permitted under (i) or (ii)
shall, as a precondition to such transfer, agree in a writing delivered to


<PAGE>   2


Kana, to be bound by the terms and conditions of this Silknet Stock Voting
Agreement. This Silknet Stock Voting Agreement shall expire on the earlier of
(a) the date and time on which the Merger shall become effective in accordance
with the terms of the Merger Agreement or (b) the date on which the Merger
Agreement shall be terminated pursuant to Section 8.01 of the Merger Agreement
(the "EXPIRATION DATE"). Holder agrees that any shares of capital stock of
Silknet that Holder purchases or with respect to which Holder otherwise acquires
beneficial ownership after the date of this Silknet Stock Voting Agreement and
prior to the Expiration Date ("NEW SHARES") shall be subject to the terms and
conditions of this Silknet Stock Voting Agreement to the same extent as if such
shares constituted Shares.

     Section 2    AGREEMENT TO VOTE SHARES. Holder hereby agrees to appear, or,
using Holder's best efforts and to the full extent legally permitted, cause the
holder of record on any applicable record date to appear in person or by proxy
for the purpose of obtaining a quorum at any annual or special meeting of
stockholders of the Company and at any adjournment thereof at which matters
relating to the Merger, the Merger Agreement or any transaction contemplated
thereby are considered. At every meeting of the Silknet stockholders called with
respect to any of the following, and at any adjournment thereof, Holder shall
vote or, using Holder's best efforts and to the full extent legally permitted,
cause the holder of record to vote the Shares and any New Shares (except those
Shares or New Shares which are not voting securities):

          (a) in favor of adoption of the Merger Agreement and approval of the
     Merger and any proposal or action which would, or could reasonably be
     expected to, facilitate the Merger;

          (b) against approval of any proposal made in opposition to or
     competition with consummation of the Merger and the Merger Agreement;

          (c) against any merger, consolidation or other business combination of
     Silknet with, sale of assets or stock of Silknet to, or reorganization or
     recapitalization involving Silknet with, any party other than Kana or an
     affiliate of Kana as contemplated by the Merger Agreement;

          (d) against any liquidation, or winding up of Silknet; and

          (e) against any other proposal or action which would, or could
     reasonably be expected to, impede, frustrate, prevent, prohibit or
     discourage the Merger (each of (b) through (e) collectively, an "OPPOSING
     PROPOSAL").

Holder, as the holder of voting stock of Silknet, shall be present, in person or
by proxy, or, using Holder's best efforts and to the full extent legally
permitted, cause the holder of record to be present, in person or by proxy, at
all meetings of stockholders of Silknet so that all Shares and New Shares are
counted for the purposes of determining the presence of a quorum at such
meetings. This Silknet Stock Voting Agreement is intended to bind Holder only
with respect to the specific matters set forth herein, and shall not prohibit
Holder from acting in accordance with Holder's fiduciary duties as an officer or
director of Silknet.

     Section 3     OPTION EXERCISE. Holder agrees that if, at any meeting of
stockholders of Silknet called with respect to any of (a) through (e) of Section
2 hereof, the number of shares of

                                       2

<PAGE>   3

Silknet's capital stock voting in accordance with (a) through (e) of Section 2
hereof shall not be enough to prevail in such vote, Holder will immediately
exercise any and all options and warrants, or otherwise convert or exercise any
securities, beneficially owned by him (to the full extent permitted by
applicable law) in order to vote all New Shares resulting from such exercise or
conversion in accordance with Section 2 hereof. Kana hereby agrees that, in the
event Holder is required pursuant to this Section 3 to convert or exercise any
securities and upon request by Holder, Kana will make a loan, evidenced by a
promissory note and on reasonable terms, to Holder (or any third party) in the
amount of any tax imposed on Holder (or such third party) solely as a result of
such conversion or exercise.

     Section 4     IRREVOCABLE PROXY. Concurrently with the execution of this
Silknet Stock Voting Agreement, Holder agrees to deliver to Kana a proxy in the
form attached hereto as Annex A (the "PROXY"), which shall be irrevocable to the
extent provided therein; provided, however, that the Proxy shall be revoked upon
termination of this Silknet Stock Voting Agreement in accordance with its terms.

     Section 5     REPRESENTATIONS, WARRANTIES AND COVENANTS OF HOLDER. Holder
hereby represents, warrants and covenants to Kana as follows:

          (a) OWNERSHIP OF SHARES. Holder (i) is the holder of record or
     beneficial owner or holder of the voting power of the Shares and will be
     the holder of record or beneficial owner or holder of voting power of all
     New Shares, if any, which at the date hereof and at all times until the
     Expiration Date will be free and clear of any liens, claims, options,
     charges or other encumbrances that would interfere with the voting of the
     Shares or the granting of any proxy with respect thereto, (ii) does not
     beneficially own any shares of capital stock of Silknet other than the
     Shares (except to the extent that Holder currently disclaims beneficial
     ownership in accordance with applicable law) and (iii) has full power and
     authority to make, enter into, deliver and carry out the terms of this
     Silknet Stock Voting Agreement and the Proxy.

          (b) NO VOTING TRUSTS AND AGREEMENTS. Between the date of this
     Agreement and the Expiration Date, Holder will not, and will not permit any
     entity under Holder's control to, deposit any shares of Silknet capital
     stock held by Holder or such entity in a voting trust or subject any shares
     of Silknet capital stock held by such Holder or such entity to any
     arrangement or agreement with respect to the voting of such shares of
     capital stock, other than agreements entered into with Kana.

          (c) VALIDITY; NO CONFLICT. This Silknet Stock Voting Agreement
     constitutes the legal, valid and binding obligation of Holder. Neither the
     execution of this Silknet Stock Voting Agreement by Holder nor the
     consummation of the transactions contemplated herein will violate or result
     in a breach of (i) any provision of any trust, charter, partnership
     agreement or other charter document applicable to Holder, (ii) any
     agreement to which Holder is a party or by which Holder is bound, (iii) any
     decree, judgment or order to which Holder is subject, or (iv) any law or
     regulation now in effect applicable to Holder.

                                       3

<PAGE>   4

          (d) NO PROXY SOLICITATIONS. Subject to the last sentence of Section 2,
     between the date of this Agreement and the Expiration Date, Holder will
     not, and will not permit any entity under Holder's control, to (i) solicit
     proxies or become a "participant" in a "solicitation" (as such terms are
     defined in Rule 14A under the Exchange Act) with respect to an Opposing
     Proposal or otherwise encourage or assist any party in taking or planning
     any action which would compete with, restrain or otherwise serve to
     interfere with or inhibit the timely consummation of the Merger in
     accordance with the terms of the Merger Agreement, (ii) initiate a
     stockholders' vote with respect to an Opposing Proposal or (iii) become a
     member of a "group" (as such term is used in Section 13(d) of the Exchange
     Act) with respect to any voting securities of Silknet with respect to an
     Opposing Proposal.

     Section 6     REPRESENTATIONS, WARRANTIES AND COVENANTS OF KANA. Kana
represents, warrants and covenants to Holder as follows:

          (a) DUE AUTHORIZATION. This Silknet Stock Voting Agreement has been
     authorized by all necessary corporate action on the part of Kana and has
     been duly executed by a duly authorized officer of Kana.

          (b) VALIDITY; NO CONFLICT. This Silknet Stock Voting Agreement
     constitutes the legal, valid and binding obligation of Kana. Neither the
     execution of this Silknet Stock Voting Agreement by Kana nor the
     consummation of the transactions contemplated herein will violate or result
     in a breach of (i) any agreement to which Kana is a party or by which Kana
     is bound, (ii) any decree, judgment or order to which Kana is subject, or
     (iii) any law or regulation now in effect applicable to Kana.

     Section 7     ADDITIONAL DOCUMENTS. Holder and Kana hereby covenant and
agree to execute and deliver any additional documents necessary or desirable, in
the reasonable opinion of Kana's legal counsel or Holder, as the case may be, to
carry out the intent of this Silknet Stock Voting Agreement.

     Section 8     LEGENDING OF SHARES. Upon the request of Kana, Holder agrees
that it shall forthwith surrender all certificates representing the Shares so
that they shall bear a conspicuous legend stating that they are subject to this
Agreement (and the restrictions on transfer provided for herein) and to an
Irrevocable Proxy. Subject to the terms of Section 2 hereof, Stockholder agrees
that it shall not Transfer the Shares without first having the aforementioned
legend affixed to the certificates representing the Shares.

     Section 9     CONSENT AND WAIVER. Holder hereby gives any consent or waiver
reasonably required for the consummation of the Merger under the terms of any
agreement to which Holder is a party.

     Section 10    TERMINATION. Notwithstanding any other provision contained
herein, this Silknet Stock Voting Agreement and the Proxy, and all obligations
of Holder hereunder and thereunder, shall terminate as of the Expiration Date.

                                       4
<PAGE>   5

     Section 11     NO SOLICITATION.

          (a) Until the earlier of the Effective Time (as defined in the Merger
     Agreement) or a valid termination of the Merger Agreement pursuant to
     Article VIII thereof, Holder will not, and will not authorize, direct or
     permit any of its officers, directors, employees, affiliates under its
     control, investment bankers, attorneys, accountants or other agents,
     advisors or representatives (collectively, "REPRESENTATIVES") to, directly
     or indirectly, (i) solicit, initiate, encourage or induce the making,
     submission or announcement of any Silknet Takeover Proposal (as defined
     below), (ii) participate in any discussions or negotiations with any person
     regarding, or furnish to any person any information with respect to, or
     take any other action to facilitate any inquiry or proposal that
     constitutes or may reasonably be expected to lead to, any Silknet Takeover
     Proposal, (iii) authorize, approve or recommend any Silknet Takeover
     Proposal, or (iv) enter into any letter of intent or similar document or
     any contract, agreement or commitment accepting or providing for any
     Silknet Takeover Proposal.

          (b) Holder and Kana agree that irreparable damage would occur in the
     event that the provisions of this Section 11 were not performed in
     accordance with their specific terms or were otherwise breached. It is
     accordingly agreed by the parties hereto that Kana shall be entitled to
     seek an injunction or injunctions to prevent breaches of this Section 11
     and to enforce specifically the terms and provisions hereof in any court of
     the United States or any state having jurisdiction, this being in addition
     to any other remedy to which the parties may be entitled at law or in
     equity.

          (c) For purposes of this Agreement, "SILKNET TAKEOVER PROPOSAL" means
     any offer or proposal for, or any indication of interest in, a merger or
     other business combination involving Silknet or the acquisition of twenty
     percent (20%) or more of the outstanding shares of capital stock of
     Silknet, or all or substantially all of the assets of Silknet or any asset
     of Silknet, the absence of which would materially diminish the value of the
     Merger to Kana or the benefits expected by Kana to be realized from the
     Merger, or any other transaction inconsistent with consummation of the
     transactions contemplated by the Merger Agreement.

     Section 12     CONFIDENTIALITY. Holder agrees (i) to hold any information
regarding this Agreement and the Merger in strict confidence and (ii) not to
divulge any such information to any third person, except to the extent any of
the same is hereafter publicly disclosed by Kana.

     Section 13     MISCELLANEOUS.

          (a) SEVERABILITY. If any term, provision, covenant or restriction of
     this Silknet Stock Voting Agreement or the Proxy (i) is held by a court of
     competent jurisdiction to be invalid, void or unenforceable for any reason,
     or (ii) would preclude the Merger from qualifying as a reorganization
     within the meaning of Section 368(a) of the Internal Revenue Code of 1986,
     as amended, such term, provision, covenant or restriction shall be modified
     or voided, as may be necessary to achieve the intent of the parties to the
     extent possible, and the remainder of the terms, provisions, covenants and
     restrictions of this

                                       5

<PAGE>   6

     Silknet Stock Voting Agreement shall remain in full force and effect and
     shall in no way be affected, impaired or invalidated.

          (b) BINDING EFFECT AND ASSIGNMENT. This Silknet Stock Voting Agreement
     and all of the provisions hereof shall be binding upon and inure to the
     benefit of the parties hereto and their respective successors and permitted
     assigns, but, except as otherwise specifically provided herein, neither
     this Silknet Stock Voting Agreement nor any of the rights, interests or
     obligations of the parties hereto may be assigned by either of the parties
     hereto without the prior written consent of the other, and any attempted
     assignment thereof without such consent shall be null and void.

          (c) AMENDMENTS AND MODIFICATIONS. This Silknet Stock Voting Agreement
     may not be modified, amended, altered or supplemented except upon the
     execution and delivery of a written agreement executed by the parties
     hereto.

          (d) SPECIFIC PERFORMANCE: INJUNCTIVE RELIEF. The parties hereto
     acknowledge that Kana will be irreparably harmed by a breach of any of the
     covenants or agreements of Holder set forth herein and that there will be
     no adequate remedy at law for such a breach. Therefore, it is agreed that,
     in addition to any other remedies which may be available to Kana upon such
     breach, Kana shall have the right to enforce such covenants and agreements
     by specific performance, injunctive relief or by any other means available
     to it at law or in equity.

          (e) NOTICES. All notices, requests, claims, demands and other
     communications hereunder shall be in writing and sufficient if delivered in
     person, by commercial overnight courier service, by confirmed telecopy, or
     sent by mail (registered or certified mail, postage prepaid, return receipt
     requested), to the respective parties as follows:

                  If to Kana:      Kana Communications, Inc.
                                   740 Bay Road
                                   Redwood City, CA 94063
                                   Fax: (650) 474-8507
                                   Attention: Chief Executive Officer

                  If to Holder:    To the address for notice set forth on
                                   the last page hereof.

                  With a copy to:  Silknet Software Inc.
                                   50 Phillippe Cote Street,
                                   Manchester, NH 03101
                                   Fax:  (603) 625-0428
                                   Attention:  Chief Executive Officer

                                       6
<PAGE>   7


                  and to:           Brobeck, Phleger & Harrison LLP
                                    Two Embarcadero Place
                                    2200 Geng Road
                                    Palo Alto, CA 94303
                                    Fax: (650) 496-2885
                                    Attention: Warren T. Lazarow, Esq.
                                               David A. Makarechian, Esq.

                  and to:           Brobeck, Phleger & Harrison LLP
                                    Two Embarcadero Place
                                    2200 Geng Road
                                    Palo Alto, CA 94303
                                    Fax: (650) 496-2777
                                    Attention: Rod J. Howard, Esq.

or to such other address as either party may have furnished to the other in
writing in accordance herewith, except that notices of change of address shall
only be effective upon receipt.

          (f) GOVERNING LAW. This Silknet Stock Voting Agreement shall be
     governed by, construed and enforced in accordance with the laws of the
     State of Delaware, without giving effect to principles of conflicts of law.
     Each party hereto irrevocably and unconditionally consents and submits to
     the jurisdiction of the courts of the State of Delaware and of the United
     States of America located in the State of Delaware for any actions, suits
     or proceedings arising out of or relating to this agreement and the
     transactions contemplated hereby.

          (g) ENTIRE AGREEMENT. This Silknet Stock Voting Agreement contains the
     entire understanding of the parties with respect to the subject matter
     hereof, and supersedes all prior negotiations and understandings between
     the parties with respect to such subject matter.

          (h) COUNTERPARTS. This Silknet Stock Voting Agreement may be executed
     in one or more counterparts, each of which shall be an original, but all of
     which together shall constitute one and the same instrument.

          (i) EFFECT OF HEADINGS. The section headings contained herein are for
     convenience only and shall not affect the construction or interpretation of
     this Silknet Stock Voting Agreement.

          (j) HOLDER CAPACITY. Notwithstanding anything herein to the contrary,
     no person executing this Agreement who is, or becomes during the term
     hereof, a director of Kana makes any agreement or understanding herein in
     his or her capacity as such director, and the agreements set forth herein
     shall in no way restrict any director in the exercise of his or her
     fiduciary duties as a director of Kana. Holder has executed this Agreement
     solely in his or her capacity as the record or beneficial holder of such
     Holder's Shares or as the trustee of a trust whose beneficiaries are the
     beneficial owners of such Holder's Shares.

                                       7
<PAGE>   8


          IN WITNESS WHEREOF, the parties have caused this Silknet Stock Voting
     Agreement to be duly executed on the day and year first above written.

                                KANA COMMUNICATIONS, INC.

                                By:
                                   --------------------------------------

                                Its:
                                    --------------------------------------





                      [SIGNATURE PAGE OF VOTING AGREEMENT]

<PAGE>   9


                                HOLDER


                                By:
                                   --------------------------------------

                                Holder's Address for Notice:

                                ------------------------------------------

                                ------------------------------------------

                                ------------------------------------------

                                Number of Shares owned beneficially:

                                ------------------------------------------

                                Number of Shares owned of record (if different
                                from above):

                                ------------------------------------------






                      [SIGNATURE PAGE OF IRREVOCABLE PROXY]


<PAGE>   10

                                     ANNEX A

                                IRREVOCABLE PROXY

     The undersigned stockholder of Silknet Software Inc., a Delaware
corporation ("SILKNET"), hereby irrevocably appoints and constitutes the members
of the Board of Directors of Kana Communications, Inc., a Delaware corporation
("KANA"), and each of them (the "PROXYHOLDERS"), the agents and proxies of the
undersigned, with full power of substitution and resubstitution, to the full
extent of the undersigned's rights with respect to the shares of capital stock
of Silknet beneficially owned by the undersigned, which shares are listed below
and any and all other shares or securities issued or issuable in respect
thereof, or which the undersigned otherwise acquires, on or after the date
hereof and prior to the date this proxy terminates (collectively, the "SHARES"),
to vote the Shares (except those Shares which are not voting securities at the
time of a vote, or are not converted into voting securities at the time of a
vote) as follows:

     The agents and proxies named above are empowered at any time prior to
     termination of this proxy to exercise all voting and other rights
     (including, without limitation, the power to execute and deliver written
     consents with respect to the Shares) of the undersigned at every annual,
     special or adjourned meeting of Silknet stockholders, and in every written
     consent in lieu of such a meeting, or otherwise,

          (a) in favor of (i) adoption of the Agreement and Plan of
     Reorganization, by and among Kana, Pistol Acquisition Corp. ("SUB"), and
     Silknet, dated as of February __, 2000, as the same may be amended from
     time to time, (the "MERGER AGREEMENT") and (ii) approval of the merger of
     Sub with and into Silknet as contemplated by the Merger Agreement (the
     "MERGER"), and any proposal or action which would, or could reasonably be
     expected to, facilitate the Merger;

          (b) against approval of any proposal made in opposition to or
     competition with consummation of the Merger and the Merger Agreement;

          (c) against any merger, consolidation or other business combination of
     Silknet with, sale of assets or stock of Silknet to, or reorganization or
     recapitalization involving Silknet with, any party other than Kana or an
     affiliate of Kana as contemplated by the Merger Agreement;

          (d) against any liquidation, or winding up of Silknet; and

          (e) against any other proposal or action which would, or could
     reasonably be expected to, prohibit or discourage the Merger.

The Proxyholders may not exercise this proxy with respect to any other matter.
The undersigned may vote the Shares on all such other matters.

     The proxy granted by the undersigned to the Proxyholders hereby is granted
as of the date of this Irrevocable Proxy in order to secure the obligations of
the undersigned set forth in Section 2 of the Silknet Stock Voting Agreement,
and is irrevocable and coupled with an interest

<PAGE>   11


in such obligations and in the interests in Silknet to be purchased and sold
pursuant to the Merger Agreement. This proxy will terminate upon the termination
of the Silknet Stock Voting Agreement in accordance with its terms.

     Upon the execution hereof, all prior proxies given by the undersigned with
respect to the Shares are hereby revoked, and no subsequent proxies will be
given with respect to the Shares until such time as this proxy shall be
terminated in accordance with its terms.

     Any obligation of the undersigned hereunder shall be binding upon the
successors and assigns of the undersigned. The undersigned authorizes the
Proxyholders to file this proxy and any substitution or revocation of
substitution with the Secretary of Silknet and with any Inspector of Elections
at any meeting of the stockholders of Silknet.

     This proxy is irrevocable and shall survive the insolvency, incapacity,
death or liquidation of the undersigned.

     Dated: February __, 2000.

     Name of Stockholder: ________________________________________________

     Signature of Stockholder: ___________________________________________

     Shares beneficially owned by Stockholder: ___________________________

     Shares owned of record by Stockholder: ______________________________


                      [SIGNATURE PAGE OF IRREVOCABLE PROXY]


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