MORGAN STANLEY DEAN WITTER MUNICIPAL INCOME TRUST
DEF 14A, 1999-11-01
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              Schedule 14A Information required in proxy statement.
                            Schedule 14A Information
                Proxy Statement Pursuant to Section 14(a) of the
             Securities and Exchange Act of 1934 (Amendment No.   )


Filed by the Registrant                        [X]
Filed by a Party other than the Registrant     [ ]

Check the appropriate box:

[ ]    Preliminary Proxy Statement
[ ]    Preliminary Additional Materials
[ ]    Confidential, for Use of the Commission Only (as permitted by
       Rule 14a-6 (e) (2))
[X]    Definitive Proxy Statement
[ ]    Definitive Additional Materials
[ ]    Soliciting Material Pursuant to Section 240.149-11 (c) or
       Section 240.14a-12


                Morgan Stanley Dean Witter Municipal Income Trust
- -------------------------------------------------------------------------------
                (Name of Registrant as Specified in its Charter)


                                 LouAnne McInnis
- -------------------------------------------------------------------------------
                   (Name of Person(s) Filing Proxy Statement)


       Payment of Filing Fee (check the appropriate box):

[X]    No fee required.
[ ]    Fee computed on table below per Exchange Act Rules 14a-6(j) (4) and 0-11.

1)     Title of each class of securities to which transaction applies:

2)     Aggregate number of securities to which transaction applies:

3)     Per unit price or other underlying value of transaction computed pursuant
       to Exchange Act Rule 0-11:

       Set forth the amount on which the filing fee is calculated and state how
       it was determined.

4)     Proposed maximum aggregate value of transaction:

5)     Fee previously paid:

[ ]    Check box if any part of the fee is offset as provided by Exchange Act
       Rule 0-11(a) (2) and identify the filing for which the offsetting fee was
       paid previously. Identify the previous filing by registration statement
       number, or the Form or Schedule and the date of its filing.

1)     Amount Previously paid:

2)     Form, Schedule or Registration Statement No.:

3)     Filing Party:

4)     Date Filed:

<PAGE>
               MORGAN STANLEY DEAN WITTER MUNICIPAL INCOME TRUST

                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

                         TO BE HELD DECEMBER 21, 1999


     The Annual Meeting of Shareholders of MORGAN STANLEY DEAN WITTER MUNICIPAL
INCOME TRUST (the "Trust"), an unincorporated business trust organized under
the laws of the Commonwealth of Massachusetts, will be held in the Career
Development Room, Sixty-First Floor, Two World Trade Center, New York, New York
10048, on December 21, 1999, at 9:00 a.m., New York City time, for the
following purposes:

            1. To elect three (3) Trustees to serve until the year 2002 Annual
      Meeting or until their successors shall have been elected and qualified;

            2. To ratify or reject the selection of PricewaterhouseCoopers LLP
      as the Trust's independent accountants for the fiscal year ending August
      31, 2000;

            3. Shareholder proposal to amend the Trust's Declaration of Trust to
      require each Trustee, within thirty days of election, to become a
      Shareholder of the Trust (Note: The Trustees unanimously recommend a vote
      AGAINST this proposal); and

            4. To transact such other business as may properly come before the
      Meeting or any adjournments thereof.

     Shareholders of record as of the close of business on October 20, 1999 are
entitled to notice of and to vote at the Meeting. If you cannot be present in
person, your management would greatly appreciate your filling in, signing and
returning the enclosed proxy promptly in the envelope provided for that
purpose. Alternatively, if you are eligible to vote telephonically by touchtone
telephone or electronically on the Internet (as discussed in the enclosed Proxy
Statement) you may do so in lieu of attending the Meeting in person.

     In the event that the necessary quorum to transact business or the vote
required to approve or reject any proposal is not obtained at the Meeting, the
persons named as proxies may propose one or more adjournments of the Meeting to
permit further solicitation of proxies. Any such adjournment will require the
affirmative vote of the holders of a majority of the Trust's shares present in
person or by proxy at the Meeting. The persons named as proxies will vote in
favor of such adjournment those proxies which have been received by the date of
the Meeting.



                                                      BARRY FINK,
                                                       Secretary


October 27, 1999
New York, New York

- --------------------------------------------------------------------------------
                                   IMPORTANT

  YOU CAN HELP THE TRUST AVOID THE NECESSITY AND EXPENSE OF SENDING FOLLOW-UP
LETTERS TO ENSURE A QUORUM BY PROMPTLY RETURNING THE ENCLOSED PROXY. IF YOU ARE
UNABLE TO BE PRESENT IN PERSON, PLEASE FILL IN, SIGN AND RETURN THE ENCLOSED
PROXY IN ORDER THAT THE NECESSARY QUORUM MAY BE REPRESENTED AT THE MEETING. THE
ENCLOSED ENVELOPE REQUIRES NO POSTAGE IF MAILED IN THE UNITED STATES. CERTAIN
SHAREHOLDERS WILL BE ABLE TO VOTE TELEPHONICALLY BY TOUCHTONE TELEPHONE OR
ELECTRONICALLY ON THE INTERNET BY FOLLOWING INSTRUCTIONS CONTAINED ON THEIR
PROXY CARDS OR ON THE ENCLOSED VOTING INFORMATION CARD.
- --------------------------------------------------------------------------------

<PAGE>

               MORGAN STANLEY DEAN WITTER MUNICIPAL INCOME TRUST
                TWO WORLD TRADE CENTER, NEW YORK, NEW YORK 10048

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

                                PROXY STATEMENT

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

                        ANNUAL MEETING OF SHAREHOLDERS

                               DECEMBER 21, 1999


     This statement is furnished in connection with the solicitation of proxies
by the Board of Trustees (the "Board") of MORGAN STANLEY DEAN WITTER MUNICIPAL
INCOME TRUST (the "Trust"), for use at the Annual Meeting of Shareholders of
the Trust to be held on December 21, 1999 (the "Meeting"), and at any
adjournments thereof.

     If the enclosed form of proxy is properly executed and returned in time to
be voted at the Meeting, the proxies named therein will vote the shares
represented by the proxy in accordance with the instructions marked thereon.
Unmarked proxies will be voted for each of the nominees for election as Trustee
and in favor of Proposal 2 and against Proposal 3. A proxy may be revoked at
any time prior to its exercise by any of the following: written notice of
revocation to the Secretary of the Trust, execution and delivery of a later
dated proxy to the Secretary of the Trust (whether by mail or, as discussed
below, by touchtone telephone or the Internet) (if returned and received in
time to be voted), or attendance and voting at the Meeting. Attendance at the
Meeting will not in and of itself revoke a proxy.

     Holders of shares of the Trust ("Shareholders") as of the close of
business on October 20, 1999, the record date for the determination of
Shareholders entitled to notice of and to vote at the Meeting, are entitled to
one vote for each share held and a fractional vote for a fractional share. On
October 20, 1999, there were 28,834,150 shares of beneficial interest
outstanding, all with $.01 par value. No person was known to own as much as 5%
of the outstanding shares of the Trust on that date. The percentage ownership
of shares of the Trust changes from time to time depending on purchases and
sales by Shareholders and the total number of shares outstanding.

     The cost of soliciting proxies for the Meeting, consisting principally of
printing and mailing expenses, will be borne by the Trust. The solicitation of
proxies will be by mail, which may be supplemented by solicitation by mail,
telephone or otherwise through Trustees, officers of the Trust or officers and
regular employees of Morgan Stanley Dean Witter Advisors Inc. ("MSDW Advisors"
or the "Investment Adviser"), Morgan Stanley Dean Witter Trust FSB ("MSDW
Trust"), Morgan Stanley Dean Witter Services Company Inc. ("MSDW Services")
and/or Dean Witter Reynolds Inc. ("DWR"), without special compensation
therefor. In addition, the Trust may employ William F. Doring and Co. as proxy
solicitor, the cost of which is not expected to exceed $3,000 and will be borne
by the Trust. The first mailing of this Proxy Statement is expected to be made
on or about October 29, 1999.

     Shareholders whose shares are registered with MSDW Trust will be able to
vote their shares by touchtone telephone or by Internet by following the
instructions on the proxy card or on the Voting Information Card accompanying
this Proxy Statement. To vote by touchtone telephone, shareholders can call the
toll-free number 1-800-690-6903. To vote by Internet, Shareholders can access
the websites www.msdwt.com or www.proxyvote.com. Telephonic and Internet voting
with MSDW Trust presently are not available to Shareholders whose shares are
held in street name.


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<PAGE>

     In certain instances, William F. Doring & Co. and MSDW Trust may call
Shareholders to ask if they would be willing to have their votes recorded by
telephone. The telephone voting procedure is designed to authenticate
Shareholders' identities, to allow Shareholders to authorize the voting of
their shares in accordance with their instructions and to confirm that their
instructions have been recorded properly. No recommendation will be made as to
how a Shareholder should vote on any Proposal other than to refer to the
recommendations of the Board. The Trust has been advised by counsel that these
procedures are consistent with the requirements of applicable law. Shareholders
voting by telephone in this manner will be asked for their social security
number or other identifying information and will be given an opportunity to
authorize proxies to vote their shares in accordance with their instructions.
To ensure that the Shareholders' instructions have been recorded correctly they
will receive a confirmation of their instructions in the mail. A special
toll-free number will be available in case the information contained in the
confirmation is incorrect. Although a Shareholder's vote may be taken by
telephone, each Shareholder will receive a copy of this Proxy Statement and may
vote by mail using the enclosed proxy card or by touchtone telephone or the
Internet as set forth above. The last proxy vote received in time to be voted,
whether by proxy card, touchtone telephone or Internet, will be the vote that
is counted and will revoke all previous votes by the Shareholder. With respect
to the solicitation of a telephonic vote by William F. Doring & Co., additional
expenses would include $7.00 per telephone vote transacted, $3.00 per outbound
telephone contact and costs relating to obtaining Shareholders' telephone
numbers, which would be borne by the Trust.


                           (1) ELECTION OF TRUSTEES


     The number of Trustees has currently been fixed by the Trustees, pursuant
to the Trust's Declaration of Trust, at eight. There are presently eight
Trustees, three of whom (Wayne E. Hedien, Manuel H. Johnson and John L.
Schroeder) are standing for election at this Meeting to serve until the year
2002 Annual Meeting, in accordance with the Trust's Declaration of Trust, as
amended.


     Six of the current eight Trustees (Michael Bozic, Edwin J. Garn, Wayne E.
Hedien, Manuel H. Johnson, Michael E. Nugent and John L. Schroeder) are
"Independent Trustees," that is, Trustees who are not "interested persons" of
the Trust, as that term is defined in the Investment Company Act of 1940, as
amended (the "1940 Act"). The other two current Trustees, Charles A.
Fiumefreddo and Philip J. Purcell, are "interested persons" (as that term is
defined in the 1940 Act) of the Trust and MSDW Advisors and thus are not
Independent Trustees. The nominees for election as Trustees of the Trust have
been proposed by the Trustees now serving or, in the case of the nominees for
positions as Independent Trustees, by the Independent Trustees now serving. All
of the Trustees previously have been elected by the Shareholders of the Trust.


     The nominees of the Board of Trustees for election as Trustee are listed
below. It is the intention of the persons named in the enclosed form of proxy
to vote the shares represented by them for the election of these nominees:
Wayne E. Hedien, Manuel H. Johnson and John L. Schroeder. Should any of the
nominees become unable or unwilling to accept nomination or election, the
persons named in the proxy will exercise their voting power in favor of such
person or persons as the Board may recommend. All of the nominees have
consented to being named in this Proxy Statement and to serve if elected. The
Trust knows of no reason why any of said nominees would be unable or unwilling
to accept nomination or election. The election of each Trustee requires the
approval of a majority of the shares represented and entitled to vote at the
Meeting.


     Pursuant to the provisions of the Trust's Declaration of Trust (Section
2.2, as amended), the Trustees are divided into three separate classes, each
class having a term of three years. The term of office of one of the three
classes will expire each year.


                                       3
<PAGE>

     The Board of Trustees previously determined that any nominee for election
as Trustee will stand for election as Trustee and serve as Trustee in one of
the three classes of Trustees as follows: Class I--Messrs. Bozic and
Fiumefreddo; Class II--Messrs. Hedien, Johnson and Schroeder; and Class
III--Messrs. Garn, Nugent and Purcell. Each nominee for Trustee at any Annual
Meeting will, if elected, serve a term of up to approximately three years
running for the period assigned to that class and terminating at the date of
the Annual Meeting of Shareholders so designated by the Board, or any
adjournment thereof. As a consequence of this method of election, the
replacement of a majority of the Board could be delayed for up to two years. In
accordance with the above, the Class II Trustees are standing for election at
this Meeting and, if elected, will serve until the year 2002 Annual Meeting or
until their successors shall have been elected and qualified.

     The following information regarding each of the nominees for election as
Trustee, and each of the other members of the Board, includes his principal
occupations and employment for at least the last five years, his age, shares of
the Trust owned, if any, as of October 20, 1999 (shown in parentheses),
positions with the Trust, and directorships or trusteeships in other companies
which file periodic reports with the Securities and Exchange Commission,
including the 92 investment companies, including the Trust, for which MSDW
Advisors serves as investment manager or investment adviser (referred to herein
collectively as the "Morgan Stanley Dean Witter Funds"), and the 3 investment
companies, TCW/DW Term Trust 2000, TCW/DW Term Trust 2002 and TCW/DW Term Trust
2003, for which MSDW Advisors' wholly-owned subsidiary, MSDW Services, serves
as manager and TCW Funds Management, Inc. serves as investment adviser
(referred to herein as the TCW/DW Term Trusts").

     The nominees for Trustee to be elected at this Meeting are:

     WAYNE E. HEDIEN, Trustee since September, 1997; age 65; Retired; Director
or Trustee of the Morgan Stanley Dean Witter Funds, the TCW/DW Term Trusts and
Discover Brokerage Index Series; Director of The PMI Group, Inc. (private
mortgage insurance); Trustee and Vice Chairman of The Field Museum of Natural
History; formerly associated with the Allstate Companies (1966-1994), most
recently as Chairman of The Allstate Corporation (March 1993-December 1994) and
Chairman and Chief Executive Officer of its wholly-owned subsidiary, Allstate
Insurance Company (July 1989-December 1994); director of various other business
and charitable organizations.

     DR. MANUEL H. JOHNSON, Trustee since July, 1991; age 50; Senior Partner,
Johnson Smick International, Inc., a consulting firm; Co-Chairman and a founder
of the Group of Seven Council (G7C), an international economic commission;
Chairman of the Audit Committee and Director or Trustee of the Morgan Stanley
Dean Witter Funds, the TCW/DW Term Trusts and Discover Brokerage Index Series;
Director of Greenwich Capital Markets Inc. (broker-dealer) and NVR Inc. (home
construction); Chairman and Trustee of the Financial Accounting Foundation
(oversight organization for the Financial Accounting Standards Board), formerly
Vice Chairman of the Board of Governors of the Federal Reserve System
(1986-1990) and Assistant Secretary of the U.S. Treasury (1982-1986).

     JOHN L. SCHROEDER, Trustee since April, 1994; age 69; Retired; Chairman of
the Derivatives Committee and Director or Trustee of the Morgan Stanley Dean
Witter Funds, the TCW/DW Terms Trusts and Discover Brokerage Index Series;
Director of the Citizens Utilities Company (telecommunications, gas, electric
and water utilities company); formerly, Executive Vice President and Chief
Investment Officer of The Home Insurance Company (August, 1991-September,
1995).

     The Trustees who are not standing for reelection at this Meeting are:

     MICHAEL BOZIC, Trustee since April, 1994; age 58; Vice Chairman of Kmart
Corporation (since December 1998); Director or Trustee of the Morgan Stanley
Dean Witter Funds, the TCW/DW Term Trusts


                                       4
<PAGE>

and Discover Brokerage Index Series; formerly Chairman and Chief Executive
Officer of Levitz Furniture Corporation (since November, 1995); and President
and Chief Executive Officer of Hills Department Stores (May, 1991-July, 1995);
formerly variously Chairman, Chief Executive Officer, President and Chief
Operating Officer of the Sears Merchandise Group of Sears, Roebuck and Co.;
Director of Eaglemark Financial Services, Inc. and Weirton Steel Corporation.

     CHARLES A. FIUMEFREDDO, Trustee since July, 1991; age 66; Chairman,
Director or Trustee, and Chief Executive Officer of the Morgan Stanley Dean
Witter Funds, the TCW/DW Term Trusts and Discover Brokerage Index Series;
formerly Chairman, Chief Executive Officer and Director of MSDW Advisors, MSDW
Services and Morgan Stanley Dean Witter Distributors Inc. ("MSDW
Distributors"), Executive Vice President of DWR, Chairman and Director of MSDW
Trust and Director and/or officer of various Morgan Stanley Dean Witter & Co.
("MSDW") subsidiaries (until June, 1998).

     EDWIN JACOB (JAKE) GARN, Trustee since January, 1993; age 67; Director or
Trustee of the Morgan Stanley Dean Witter Funds, the TCW/DW Term Trusts and
Discover Brokerage Index Series; formerly United States Senator (R-Utah)
(1974-1992) and Chairman, Senate Banking Committee (1980-1986); formerly Mayor
of Salt Lake City, Utah (1971-1974); formerly Astronaut, Space Shuttle
Discovery (April 12-19, 1985); Vice Chairman, Huntsman Corporation (chemical
company); Director of Franklin Covey (time management systems), BMW Bank of
North America (industrial loan corporation); United Space Alliance (joint
venture between Lockheed Martin and the Boeing Company) and Nuskin Asia Pacific
(multilevel marketing); member of the board of various civic and charitable
organizations.

     MICHAEL E. NUGENT, Trustee since July, 1991; age 63; General Partner,
Triumph Capital, L.P., a private investment partnership; Chairman of the
Insurance Committee and Director or Trustee of the Morgan Stanley Dean Witter
Funds, the TCW/DW Term Trusts and Discover Brokerage Index Series; formerly
Vice President, Bankers Trust Company and BT Capital Corporation (1984-1988);
director of various business organizations.

     PHILIP J. PURCELL, Trustee since April, 1994; (4,418.078 shares); age 56;
Chairman of the Board of Directors and Chief Executive Officer of MSDW, DWR and
Novus Credit Services Inc.; Director of MSDW Distributors; Director or Trustee
of the Morgan Stanley Dean Witter Funds, the TCW/DW Term Trusts and Discover
Brokerage Index Series; Director and/or officer of various MSDW subsidiaries.

     The executive officers of the Trust are: Mitchell M. Merin, President;
Barry Fink, Vice President, Secretary and General Counsel; Ronald E. Robison,
Vice President; Robert S. Giambrone, Vice President; Joseph J. McAlinden, Vice
President and Thomas F. Caloia, Treasurer; and James F. Willison, Vice
President; Joseph R. Arcieri, Vice President; Gerard J. Lian, Vice President
and Katherine H. Stromberg, Vice President. In addition, Marilyn K. Cranney,
Natasha Kassian, Todd Lebo, LouAnne D. McInnis, Carsten Otto and Ruth Rossi
serve as Assistant Secretaries of the Trust.

     Mr. Merin is 46 years old and is currently President and Chief Operating
Officer of Asset Management of MSDW (since December 1998), President, Director
(since April 1997) and Chief Executive Officer (since June 1998) of MSDW
Advisors and MSDW Services, Chairman, Chief Executive Officer and Director of
the MSDW Distributors (since June 1998), Chairman and Chief Executive Officer
(since June 1998) and Director (since January 1998) of MSDW Trust, President of
the Morgan Stanley Dean Witter Funds, the TCW/DW Term Trusts and Discover
Brokerage Index Series (since May 1999), and Director of various other MSDW
subsidiaries. Mr. Fink is 44 years old and is currently Senior Vice President
(since March, 1997), Secretary and General Counsel (since February 1997) and
Director (since July 1998) of MSDW Advisors and MSDW Services and (since August
1996) Assistant Secretary of DWR; he is also Senior Vice President (since
March, 1997), Assistant Secretary and Assistant General Counsel of MSDW
Distributors (since February 1997). He


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<PAGE>

was previously Vice President, Assistant Secretary and Assistant General
Counsel of MSDW Advisors and MSDW Services. Mr. Robison is 60 years old and is
currently Executive Vice President and Chief Administrative Officer of MSDW
Advisors and MSDW Services (since September 1998) and Director (since February
1999) of MSDW Advisors and MSDW Services; prior thereto he was a Managing
Director of the TCW Group, Inc. Mr. Giambrone is 45 years old and is currently
Senior Vice President of MSDW Advisors, MSDW Services, MSDW Distributors and
MSDW Trust (since August 1995) and Director of MSDW Trust (since April, 1996).
He was formerly a partner of KPMG Peat Marwick, LLP. Mr. McAlinden is 56 years
old and is currently Executive Vice President and Chief Investment Officer of
MSDW Advisors (since April 1996) and Director of MSDW Trust (since April 1996).
He was previously Senior Vice President of MSDW Advisors (June 1995-April
1996). He was formerly a Managing Director at Dillon Read. Mr. Caloia is 53
years old and is currently First Vice President and Assistant Treasurer of MSDW
Advisors and MSDW Services. Mr. Willison is 56 years old and is currently
Senior Vice President of MSDW Advisors. Mr. Arcieri is 51 years old and is
currently Vice President of MSDW Advisors. Mr. Lian is 44 years old and is
currently Vice President of MSDW Advisors. Ms. Stromberg is 51 years old and is
currently Vice President of MSDW Advisors. Other than Messrs. Robison,
Giambrone and McAlinden, each of the above officers has been an employee of
MSDW Advisors or its affiliates for over five years.


THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES

     The Board of Trustees currently consists of eight (8) trustees. These same
individuals also serve as directors or trustees for all of the Morgan Stanley
Dean Witter Funds, and are referred to in this section as Trustees. As of the
date of this Proxy Statement, there are a total of 92 Morgan Stanley Dean
Witter Funds, comprised of 127 portfolios. As of September 30, 1999, the Morgan
Stanley Dean Witter Funds had total net assets of approximately $127.4 billion
and more than six million shareholders.

     Six Trustees (75% of the total number) have no affiliation or business
connection with MSDW Advisors or any of its affiliated persons and do not own
any stock or other securities issued by MSDW Advisors' parent company, MSDW.
These are the "disinterested" or "independent" Trustees.

     Law and regulation establish both general guidelines and specific duties
for the Independent Trustees. The Morgan Stanley Dean Witter Funds seek as
Independent Trustees individuals of distinction and experience in business and
finance, government service or academia; these are people whose advice and
counsel are in demand by others and for whom there is often competition. To
accept a position on the Funds' Boards, such individuals may reject other
attractive assignments because the Funds make substantial demands on their
time.

     All of the Independent Trustees serve as members of the Audit Committee .
In addition, three of them, including two Independent Trustees, also serve as
members of the Derivatives Committee and the Insurance Committee. During the
calendar year ended December 31, 1998, the Audit Committee, the Derivatives
Committee, the Insurance Committee and the Independent Trustees held a combined
total of twelve meetings. The Trust does not have any nominating or
compensation committees.

     The Independent Trustees are charged with recommending to the full Board
approval of management, advisory and administration contracts, and distribution
and underwriting agreements; continually reviewing Trust performance; checking
on the pricing of portfolio securities, brokerage commissions, transfer agent
costs and performance, and trading among Funds in the same complex; and
approving fidelity bond and related insurance coverage and allocations, as well
as other matters that arise from time to time.

     The Audit Committee is charged with recommending to the full Board the
engagement or discharge of the Trust's independent accountants; directing
investigations into matters within the scope of the independent accountants'
duties, including the power to retain outside specialists; reviewing with the
independent


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<PAGE>

accountants the audit plan and results of the auditing engagement; approving
professional services provided by the independent accountants and other
accounting firms prior to the performance of such services; reviewing the
independence of the independent accountants; considering the range of audit and
non-audit fees; reviewing the adequacy of the Trust's system of internal
controls; and preparing and submitting Committee meeting minutes to the full
Board.

     The Board of each Fund has formed a Derivatives Committee to approve
parameters for and monitor the activities of the Fund with respect to
derivative investments, if any, made by the Fund. Finally, the Board of each
Fund has formed an Insurance Committee to review and monitor the insurance
coverage maintained by the Fund.

     For the fiscal year ended August 31, 1999, the Board of Trustees of the
Trust held 5 meetings, and the Audit Committee, the Independent Trustees, the
Derivatives Committee and the Insurance Committee of the Trust held 3, 7, 5 and
3 meetings, respectively. No Trustee attended fewer than 75% of the meetings of
the Board of Trustees, the Audit Committee, the Independent Trustees or the
Derivatives Committee held while he served in such positions.


ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL MORGAN
STANLEY DEAN WITTER FUNDS


     The Independent Trustees and the Funds' management believe that having the
same Independent Trustees for each of the Morgan Stanley Dean Witter Funds
avoids the duplication of effort that would arise from having different groups
of individuals serving as Independent Trustees for each of the Funds or even of
sub-groups of Funds. They believe that having the same individuals serve as
Independent Trustees of all the Funds tends to increase their knowledge and
expertise regarding matters which affect the Fund complex generally and
enhances their ability to negotiate on behalf of each Fund with the Fund's
service providers. This arrangement also precludes the possibility of separate
groups of Independent Trustees arriving at conflicting decisions regarding
operations and management of the Funds and avoids the cost and confusion that
would likely ensue. Finally, having the same Independent Trustees serve on all
Fund Boards enhances the ability of each Fund to obtain, at modest cost to each
separate Fund, the services of Independent Trustees, of the caliber, experience
and business acumen of the individuals who serve as Independent Trustees of the
Morgan Stanley Dean Witter Funds.


SHARE OWNERSHIP BY TRUSTEES


     The Trustees have adopted a policy pursuant to which each Trustee and/or
his or her spouse is required to invest at least $25,000 in any of the Funds in
the Morgan Stanley Dean Witter Funds complex or Discover Brokerage Index Series
on whose boards the Trustee serves. In addition, the policy contemplates that
the Trustees will, over time, increase their aggregate investment in the Funds
above the $25,000 minimum requirement. The Trustees may allocate their
investments among specific Funds in any manner they determine is appropriate
based on their individual investment objectives. As of the date of this Proxy
Statement, each Trustee is in compliance with the policy. Any future Trustee
will be given a one year period following his or her election within which to
comply with the foregoing. As of September 30, 1999, the total value of the
investments by the Trustees and/or their spouses in shares of the Morgan
Stanley Dean Witter Funds was approximately $43.4 million.

     As of the record date for this Meeting, the aggregate number of shares of
beneficial interest of the Trust owned by the Trust's officers and Trustees as
a group was less than 1 percent of the Trust's shares of beneficial interest
outstanding.


                                       7
<PAGE>

COMPENSATION OF INDEPENDENT TRUSTEES

     The Trust pays each Independent Trustee an annual fee of $800 plus a per
meeting fee of $50 for meetings of the Board of Trustees, the Independent
Trustees or Committees of the Board of Trustees attended by the Trustee (the
Trust pays the Chairman of the Audit Committee an annual fee of $750 and pays
the Chairmen of the Derivatives and Insurance Committees additional annual fees
of $500). If a Board meeting and a meeting of the Independent Trustees or a
Committee meeting, or a meeting of the Independent Trustees and/or more than
one Committee meeting, take place on a single day, the Trustees are paid a
single meeting fee by the Trust. The Trust also reimburses such Trustees for
travel and other out-of-pocket expenses incurred by them in connection with
attending such meetings. Trustees and officers of the Trust who are or have
been employed by the Investment Adviser or an affiliated company receive no
compensation or expense reimbursement from the Trust for their services as
Trustee.

     The following table illustrates the compensation paid to the Trust's
Independent Trustees by the Trust for the fiscal year ended August 31, 1999.


                               TRUST COMPENSATION




<TABLE>
<CAPTION>
                                     AGGREGATE
                                    COMPENSATION
NAME OF INDEPENDENT TRUSTEE        FROM THE TRUST
- -------------------------------   ---------------
<S>                               <C>
Michael Bozic .................        $1,450
Edwin J. Garn .................         1,600
Wayne E. Hedien ...............         1,650
Dr. Manual H. Johnson .........         1,913
Michael E. Nugent .............         1,808
John L. Schroeder .............         1,808
</TABLE>

     The following table illustrates the compensation paid to the Trust's
Independent Trustees for the calendar year ended December 31, 1998 for services
to the 90 Morgan Stanley Dean Witter Funds that were in operation at December
31, 1998.


            CASH COMPENSATION FROM MORGAN STANLEY DEAN WITTER FUNDS




<TABLE>
<CAPTION>
                                      TOTAL CASH
                                     COMPENSATION
                                    FOR SERVICES TO
NAME OF                            90 MORGAN STANLEY
INDEPENDENT TRUSTEE                DEAN WITTER FUNDS
- -------------------------------   ------------------
<S>                               <C>
Michael Bozic .................        $120,150
Edwin J. Garn .................         132,450
Wayne E. Hedien ...............         132,450
Dr. Manuel H. Johnson .........         155,681
Michael E. Nugent .............         159,731
John L. Schroeder .............         160,731
</TABLE>

     As of the date of this Proxy Statement, 55 of the Morgan Stanley Dean
Witter Funds, including the Trust, have adopted a retirement program under
which an Independent Trustee who retires after serving for at least


                                       8
<PAGE>

five years (or such lesser period as may be determined by the Board) as an
Independent Director or Trustee of any Morgan Stanley Dean Witter Fund that has
adopted the retirement program (each such Fund referred to as an "Adopting
Fund" and each such Trustee referred to as an "Eligible Trustee") is entitled
to retirement payments upon reaching the eligible retirement age (normally,
after attaining age 72). Annual payments are based upon length of service.
Currently, upon retirement, each Eligible Trustee is entitled to receive from
the Adopting Fund, commencing as of his or her retirement date and continuing
for the remainder of his or her life, an annual retirement benefit (the
"Regular Benefit") equal to 30.22% of his or her Eligible Compensation plus
0.5036667% of such Eligible Compensation for each full month of service as an
Independent Director or Trustee of any Adopting Fund in excess of five years up
to a maximum of 60.44% after ten years of service. The foregoing percentages
may be changed by the Board.(1) "Eligible Compensation" is one-fifth of the
total compensation earned by such Eligible Trustee for service to the Adopting
Fund in the five year period prior to the date of the Eligible Trustee's
retirement. Benefits under the retirement program are not secured or funded by
the Adopting Funds.

     The following table illustrates the retirement benefits accrued to the
Trust's Independent Trustees by the Trust for the fiscal year ended August 31,
1999 and by the 55 Morgan Stanley Dean Witter Funds (including the Trust) for
the year ended December 31, 1998, and the estimated retirement benefits for the
Trust's Independent Trustees, to commence upon their retirement, from the Trust
as of August 31, 1999 and from the 55 Morgan Stanley Dean Witter Funds as of
December 31, 1998.

  RETIREMENT BENEFITS FROM THE FUND AND ALL MORGAN STANLEY DEAN WITTER FUNDS




<TABLE>
<CAPTION>
                                       FOR ALL ADOPTING FUNDS
                                  ---------------------------------
                                                                                               ESTIMATED ANNUAL
                                     ESTIMATED                         RETIREMENT BENEFITS           BENEFITS
                                      CREDITED                         ACCRUED AS EXPENSES      UPON RETIREMENT(2)
                                       YEARS           ESTIMATED      ---------------------   ----------------------
                                   OF SERVICE AT     PERCENTAGE OF                 BY ALL       FROM     FROM ALL
                                     RETIREMENT         ELIGIBLE       BY THE     ADOPTING      THE      ADOPTING
NAME OF INDEPENDENT TRUSTEE         (MAXIMUM 10)      COMPENSATION      TRUST       FUNDS      TRUST      FUNDS
- -------------------------------   ---------------   ---------------   --------   ----------   -------   ---------
<S>                               <C>               <C>               <C>        <C>          <C>       <C>
Michael Bozic .................          10               60.44%        $384      $22,377      $937      $52,250
Edwin J. Garn .................          10               60.44          571       35,225       937       52,250
Wayne E. Hedien ...............           9               51.37          721       41,979       796       44,413
Dr. Manuel H. Johnson .........          10               60.44          233       14,047       937       52,250
Michael E. Nugent .............          10               60.44          404       25,336       937       52,250
John L. Schroeder .............           8               50.37          781       45,117       796       44,343
</TABLE>

- -------------------
(1)   An Eligible Trustee may elect alternate payments of his or her retirement
      benefits based upon the combined life expectancy of such Eligible Trustee
      and his or her spouse on the date of such Eligible Trustee's retirement.
      The amount estimated to be payable under this method, through the
      remainder of the later of the lives of such Eligible Trustee and spouse,
      will be the actuarial equivalent of the Regular Benefit. In addition, the
      Eligible Trustee may elect that the surviving spouse's periodic payment
      of benefits will be equal to a lower percentage of the periodic amount
      when both spouses were alive.

(2)   Based on current levels of compensation. Amount of annual benefits also
      varies depending on the Trustee's elections described in Footnote (1)
      above.


     THE BOARD UNANIMOUSLY RECOMMENDS THAT SHAREHOLDERS VOTE FOR THE ELECTION
FOR EACH OF THE TRUSTEES NOMINATED FOR ELECTION.

INVESTMENT ADVISER

     Morgan Stanley Dean Witter Advisors Inc. is the Trust's investment
adviser. MSDW Advisors maintains its offices at Two World Trade Center, New
York, New York 10048. MSDW Advisors, which was incorporated


                                       9
<PAGE>

in July, 1992 under the name Dean Witter InterCapital Inc., changed its name to
Morgan Stanley Dean Witter Advisors Inc. on June 22, 1998. MSDW Advisors is a
wholly-owned subsidiary of MSDW, a preeminent global financial services firm
that maintains leading market positions in each of its three primary
businesses--securities, asset management and credit services. MSDW Advisors'
wholly-owned subsidiary, MSDW Services, pursuant to an Administration
Agreement, serves as the Administrator of the Trust. The address of MSDW
Services is that of MSDW Advisors set forth above.


     The Principal Executive Officer and Directors of MSDW Advisors are
Mitchell M. Merin, President and Chief Executive Officer, Ronald E. Robison,
Executive Vice President and Chief Administrative Officer and Barry Fink,
Senior Vice President, Secretary and General Counsel. The principal occupations
of Messrs. Merin, Robison and Fink are described above under the section
"Election of Trustees." The business address of the Executive Officer and other
Directors is Two World Trade Center, New York, New York 10048.


     MSDW Advisors and its wholly-owned subsidiary, MSDW Services, serve in
various investment management, advisory, management and administrative
capacities to investment companies and pension plans and other institutional
and individual investors.


     MSDW has its offices at 1585 Broadway, New York, New York 10036. There are
various lawsuits pending against MSDW involving material amounts which, in the
opinion of its management, will be resolved with no material effect on the
consolidated financial position of the company.


  (2) RATIFICATION OR REJECTION OF SELECTION OF INDEPENDENT ACCOUNTANTS


     The Trustees have unanimously selected the firm of PricewaterhouseCoopers
LLP as the Trust's independent accountants for the fiscal year ending August
31, 2000. Its selection is being submitted for ratification or rejection by
Shareholders at the Meeting. PricewaterhouseCoopers LLP has been the
independent accountants for the Trust since its inception, and has no direct or
indirect financial interest in the Trust.


     A representative of PricewaterhouseCoopers LLP is expected to be present
at the Meeting and will be available to respond to appropriate questions of
Shareholders.


     The affirmative vote of the holders of a majority of the shares
represented and entitled to vote at the Annual Meeting is required for
ratification of the selection of PricewaterhouseCoopers LLP as the independent
accountants for the Trust.


     THE TRUSTEES UNANIMOUSLY RECOMMEND THAT THE SHAREHOLDERS RATIFY THE
SELECTION OF PRICEWATERHOUSECOOPERS LLP AS THE INDEPENDENT ACCOUNTANTS FOR THE
TRUST.


      (3) SHAREHOLDER PROPOSAL TO AMEND THE TRUST'S DECLARATION OF TRUST TO
          REQUIRE EACH TRUSTEE, WITHIN THIRTY DAYS OF ELECTION, TO BECOME A
                            SHAREHOLDER OF THE TRUST


     The Trust has been informed by Carol W. Mullett, 1420 Fern Court, Vero
Beach, Florida 32963-4009, a shareholder of record who owned approximately
11,013.8 shares at October 20, 1999 (the "Proponent"), that she intends to
submit the following proposal (the "Shareholder Proposal") at the Meeting:


     RESOLVED, that the Declaration of Trust be amended to require that each
Trustee, within thirty days of election, become a shareholder of the Trust.


                                       10
<PAGE>

            The Proponent has requested that the following statement be included
      in support of her proposal:

            Surely the Trustees could better understand and represent our
      interests if they were shareholders themselves. You would think they would
      want to share the risks and rewards of our investment. Yet, only one of
      the Trustees is a shareholder in our Trust. In fact, the other seven
      Trustees don't own a single share. You can read below a lengthy litany of
      excuses seeking to convince you that we are somehow better off because
      these Trustees WILL NOT invest in our Trust. Let's look at their excuses:
      I call them the THREE LITTLE FIGS.

            Fig Leaf #1 -- "The Trustees have adopted a policy" which requires
      "each Trustee . . . to invest at least $25,000 in any of the Funds." But
      they refuse to invest even $10 in our Trust. And, believe-it-or-not, the
      Trustees can meet their requirement with a money market fund! This is the
      scantiest of the fig leaves.

            Fig Leaf #2 -- "The Trust's objectives and policies may not be
      appropriate for a Trustee." I guess this means that what's good for us
      isn't good for them. Aw, come on guys -- you can meet our proposed
      requirement by investing less than $10.

            Fig Leaf #3 -- "Any policy which requires the Trustees to own shares
      of a specific Fund . . . could logically be extended to all Funds." This
      excuse is nothing but a smokescreen since my proposal applies only to MSDW
      Municipal Income Trust and has no application to any other company. Will
      logic oblige the Trustees to invest in all the Funds if my proposal
      passes? They refuse to answer: impaled on a fig leaf?

     The Trustees complain about the proxy costs imposed on the Trust by my
proposal. They don't tell you that I have offered to GIVE shares to each
Trustee and withdraw my proposal. They declined my offer.

     The Trustees ballyhoo their Share Ownership Policy. They don't tell you
that before my proposal they had NO share ownership requirement.

     The Trustees argue that my proposal and other similar proposals have not
been successful. They don't tell you that on several occasions these proposals
have been approved by an overwhelming majority of those voting. In fact, the
shareholders of our Trust once voted over 6 to 1 to approve my proposal! It
failed to pass only because it narrowly missed quorum (by 2%).

          I urge you to vote for my proposal and encourage the Trustees to join
     us as stockholders.

          THE BOARD OF TRUSTEES UNANIMOUSLY RECOMMENDS THAT YOU VOTE AGAINST THE
     SHAREHOLDER PROPOSAL.


RECOMMENDATION OF THE BOARD OF TRUSTEES

     The same proposal by Mrs. Mullett has made to the Shareholders of this
Trust, to the Shareholders of other Trusts in the Morgan Stanley Dean Witter
complex of Mutual Funds by either Mrs. Mullett or by Mrs. Mullett and her
husband, Edwin S. Mullett, jointly, as well as to Shareholders of the TCW/DW
Term Trusts by either Mr. Mullett, or by Mr. and Mrs. Mullett jointly, a total
of 24 times. Each time the Trustees determined to oppose the proposal, as in
their view it was not in the best interests of the Shareholders of the Trusts.
The Trustees continue to adhere to this view.

     The Trustees have already adopted a share ownership proposal, which is
consistent with the recommendations made by the Investment Company Institute
Advisory Group on Best Practices for Fund Directors.

     Under the share ownership policy, the Trustees have invested over $43
million in the Morgan Stanley Dean Witter complex of Funds, and each of the
Trustees is in full compliance with the Morgan Stanley Dean Witter Funds' share
ownership policy without considering any investments in money market funds.


                                       11
<PAGE>

     Mrs. Mullett ridicules the Trust share ownership policy, but fails to
explain how the investment of approximately $10.00 in this Trust would achieve
the benefits she claims this proposal will achieve for shareholders. Nor does
she tell you about the additional proxy costs imposed upon the Trust and upon
you, the shareholders, whose interests she purports to represent, each time her
proposal is submitted to shareholders.

     She also does not tell you that she or Mr. Mullett, or both of them, have
made the same proposal in proxies of this Trust and other Trusts in the Morgan
Stanley Dean Witter complex, as well as in proxies of the TCW/DW Term Trusts, a
total of 24 times. None of these proposals has been successful.

     The Trustees once again urge you to defeat this proposal. Why this
proposal is in anyone's interest, especially given the share ownership policy
currently in effect, defies logic. The reasons for the Trustees decision are
reiterated below.


THE SHARE OWNERSHIP POLICY

     Each Trustee and/or his spouse is required to invest at least $25,000 in
any of the funds in the Morgan Stanley Dean Witter complex, including this
Trust, on whose Board the Trustee serves.

     In addition, the policy contemplates that the Trustees will over time
increase their aggregate investment in funds above the $25,000 minimum
requirement. The Trustees may allocate their investments among specific funds
in any amount that they determine is appropriate based on their individual
investment objectives, the same right held by each individual shareholder.

     As of the date of this proxy statement, each Trustee is in compliance with
the policy. As of September 30, 1999, the total value of shares of Morgan
Stanley Dean Witter Funds owned by the Trustees and/or their spouses was
approximately $43.4 million. This policy is precisely in line with the
recommendations of the Advisory Group on Best Practices for Fund Directors
described below.


REASONS FOR OPPOSING THE SHAREHOLDER PROPOSAL

     The share ownership policy requires the Trustees to make a significant
investment in the Funds in the Morgan Stanley Dean Witter complex, which
includes the Trust, while allowing the Trustees to select the specific Funds
that meet their own individual investment needs. As stated in the three
previous years' proxy statements, the Trustees believe it is not necessary to
own shares of any particular Trust to act in the best interests of shareholders
and that they can carry out their duties and functions diligently and
effectively with or without owning shares of the Trust. In addition, because
the Trust's objectives and policies may not be appropriate for a Trustee's
individual financial circumstances, the Trust could be inhibited in its ability
to attract Trustees if the available pool is limited to those whose personal
financial needs are met by the Trust's objectives and policies.

     On June 24, 1999, the Investment Company Institute (the national
association of the American investment company industry) publicly released the
recommendations of the Report of the Advisory Group on Best Practices for Fund
Directors. One of those recommendations is that "investment company boards
adopt a policy that requires fund directors to invest in one or more of the
funds [in a complex] on whose boards they serve." This is precisely what the
Trustees have had in effect for the past several years. The objectives of the
recommended policy are to enable directors to better serve the interests of
fund shareholders (i) since share ownership helps align the interests of
directors with those of shareholders in a complex, and (ii) the directors
should better understand the quality of shareholder services provided by the
fund group if they experience those services first hand. The Advisory Group
decided not to recommend a policy requiring directors to invest in every fund
on whose board they serve since that could result "in de minimis investments in
each fund [in the


                                       12
<PAGE>

complex] and would not be likely to serve the [foregoing] objectives to any
greater extent than requiring ownership of shares of some of the funds."
Currently, there are approximately 127 investment portfolios in the Morgan
Stanley Dean Witter Fund complex.

     The Trustees continue to believe that any policy requiring the Trustees to
own shares of a specific Fund for which they serve as Trustees, without regard
to their own respective investment objectives, could logically be extended to
all the Funds in the Morgan Stanley Dean Witter complex. The Trustees believe
that such a complex-wide share ownership requirement would be impractical and
undesirable because it could make it more difficult to maintain the same board
of directors for all the Funds given the large number of Funds in the complex.
The Advisory Group specifically recommended that all fund complexes with any
substantial number of funds generally adopt either a unitary or cluster board
structure. The Trustees believe that having the same Trustees for each of the
Morgan Stanley Dean Witter Funds is in the best interests of all the Funds'
shareholders for several reasons. First, a common board enhances the ability of
each Fund to obtain, at modest cost to each separate Fund, the services of high
caliber Trustees. Separate boards for individual Morgan Stanley Dean Witter
Funds would result in operational inefficiencies and increased costs to you,
the shareholders. In addition, having a common board avoids the duplication of
effort that would arise from having different groups of individuals serving as
Trustees for each of the Funds and avoids the cost and confusion that may arise
from different conclusions being reached by different boards on the same
operations and management issues. Finally, serving as Trustees of all Funds
tends to increase a Trustee's knowledge and expertise regarding matters which
affect all the Funds in the complex and enhances the ability to negotiate on
behalf of each Fund with the Fund's service providers.

     For the reasons stated above and in light of the fact that they have
adopted the share ownership policy described above, the Trustees unanimously
recommend that shareholders vote AGAINST the shareholder proposal.

     The affirmative vote of the holders of a majority of the shares
represented and entitled to vote at the Meeting is required for the approval of
the shareholder proposal.


                            ADDITIONAL INFORMATION

     In the event that the necessary quorum to transact business or the vote
required to approve or reject any proposal is not obtained at the Meeting, the
persons named as proxies may propose one or more adjournments of the Meeting to
permit further solicitation of proxies. Any such adjournment will require the
affirmative vote of the holders of a majority of the Trust's shares present in
person or by proxy at the Meeting. The persons named as proxies will vote in
favor of such adjournment those proxies which have been received by the date of
the Meeting.

     Abstentions and, if applicable, broker "non-votes" will not count as votes
in favor of any of the proposals, and broker "non-votes" will not be deemed to
be present at the Meeting for purposes of determining whether a particular
proposal to be voted upon has been approved. Broker "non-votes" are shares held
in street name for which the broker indicates that instructions have not been
received from the beneficial owners or other persons entitled to vote and for
which the broker does not have discretionary voting authority.


                            SHAREHOLDERS PROPOSALS

     Proposals of security holders intended to be presented at the next Annual
Meeting of Shareholders must be received no later than July 5, 2000, for
inclusion in the proxy statement for that meeting. The mere submission of a
proposal does not guarantee its inclusion in the proxy materials or its
presentation at the meeting. Certain rules under the federal securities laws
must be met.


                                       13
<PAGE>

            SECTION 16(A) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     The following persons are "reporting persons" under Section 16 of the
Securities Exchange Act of 1934 and had not previously filed an "Initial
Statement of Beneficial Ownership of Securities" on Form 3: Mitchell M. Merin,
Ronald E. Robison, Joseph J. McAlinden, Edwin J. Garn, Manuel H. Johnson,
Michael E. Nugent, Barry Fink, Thomas F. Caloia, James F. Willison. None of the
above reporting persons has ever held any shares of the Trust.


                            REPORTS TO SHAREHOLDERS

     THE TRUST'S MOST RECENT ANNUAL REPORT, FOR THE FISCAL YEAR ENDED AUGUST
31, 1999, HAS PREVIOUSLY BEEN SENT TO SHAREHOLDERS AND IS AVAILABLE WITHOUT
CHARGE UPON REQUEST FROM NINA WESSEL AT MORGAN STANLEY DEAN WITTER TRUST FSB,
HARBORSIDE FINANCIAL CENTER, PLAZA TWO, JERSEY CITY, NEW JERSEY 07311
(TELEPHONE 1-800-869-NEWS) (TOLL-FREE).


                          INTEREST OF CERTAIN PERSONS

     MSDW, MSDW Advisors, DWR, MSDW Services and certain of their respective
Directors, Officers, and employees, including persons who are Trustees or
Officers of the Trust, may be deemed to have an interest in certain of the
proposals described in this Proxy Statement to the extent that certain of such
companies and their affiliates have contractual and other arrangements,
described elsewhere in this Proxy Statement, pursuant to which they are paid
fees by the Trust, and certain of those individuals are compensated for
performing services relating to the Trust and may also own shares of MSDW. Such
companies and persons may thus be deemed to derive benefits from the approvals
by Shareholders of such proposals.


                                 OTHER BUSINESS

     The management knows of no other matters which may be presented at the
Meeting. However, if any matters not now known properly come before the
Meeting, it is the intention of the persons named in the enclosed form of
proxy, or their substitutes, to vote all shares that they are entitled to vote
on any such matter, utilizing such proxy in accordance with their best judgment
on such matters.


                                         By Order of the Board of Trustees


                                                    BARRY FINK
                                                     Secretary

                                       14

<PAGE>

               MORGAN STANLEY DEAN WITTER MUNICIPAL INCOME TRUST

                                     PROXY


           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES


The undersigned hereby appoints Ronald E. Robison, Barry Fink, and Joseph J.
McAlinden, or any of them, proxies, each with the power of substitution, to
vote on behalf of the undersigned at the Annual Meeting of Shareholders of
Morgan Stanley Dean Witter Municipal Income Trust on December 21, 1999, at 9:00
a.m., New York City time, and at any adjournment thereof, on the proposals set
forth in the Notice of Meeting dated October 27, 1999 as follows:





                          (Continued on reverse side)

THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN
BY THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY WILL BE
VOTED FOR THE TRUSTEES AND FOR PROPOSAL 2 AND AGAINST PROPOSAL 3 SET FORTH ON
THE REVERSE HEREOF AND AS RECOMMENDED BY THE BOARD OF TRUSTEES.

     IMPORTANT -- THIS PROXY MUST BE SIGNED AND DATED ON THE REVERSE SIDE.



<PAGE>

- --------------------------------------------------------------------------------
                                                       PLEASE MARK VOTES AS
                                                       IN THE EXAMPLE USING [X]
                                                       BLACK OR BLUE INK

TO VOTE BY MAIL, PLEASE COMPLETE AND RETURN THIS CARD
YOU ALSO MAY VOTE A PROXY BY TOUCH-TONE PHONE OR BY INTERNET
(SEE ENCLOSED VOTING INFORMATION CARD FOR FURTHER INSTRUCTIONS)

TO VOTE A PROXY BY PHONE, call Toll-Free: 1-800-690-6903

TO VOTE A PROXY BY INTERNET, visit our Website(s): WWW.MSDWT.COM or
WWW.PROXYVOTE.COM
                                                                      FOR ALL
                                            FOR        WITHHOLD       EXCEPT
1. Election of three (3) Trustees:          [ ]          [ ]            [ ]

   01. Wayne E. Hedien   02. Manuel H. Johnson   03. John L. Schroeder

 IF YOU WISH TO WITHHOLD AUTHORITY FOR ANY PARTICULAR NOMINEE,
 MARK THE "FOR ALL EXCEPT" BOX AND STRIKE A LINE THROUGH
 THE NOMINEE'S NAME.

2. Ratification of appointment of           FOR        AGAINST        ABSTAIN
   PricewaterhouseCoopers LLP as            [ ]          [ ]            [ ]
   independent accountants.

3. Shareholder proposal                     FOR        AGAINST        ABSTAIN
   (NOTE: THE TRUSTEES RECOMMEND            [ ]          [ ]            [ ]
   A VOTE AGAINST THIS PROPOSAL)



                                                  Date
                                                      -----------------------

Please make sure to sign and date this Proxy using black or blue ink. If the
shares are registered in more than one name, each joint owner or each fiduciary
should sign personally. Only authorized officers should sign for corporations.



                    ---------------------------------------
                       Shareholder sign in the box above

                    ---------------------------------------
                    Co-Owner (if any) sign in the box above


- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
         PLEASE FOLD AND DETACH AT PERFORATION ALONG DOTTED LINES


               MORGAN STANLEY DEAN WITTER MUNICIPAL INCOME TRUST

- --------------------------------------------------------------------------------
                                   IMPORTANT

              USE ONE OF THESE THREE EASY WAYS TO VOTE YOUR PROXY

 1. BY MAIL. PLEASE DATE, SIGN AND RETURN THE ABOVE PROXY CARD IN THE ENCLOSED
    POSTAGE PAID ENVELOPE.

 2. BY INTERNET. HAVE YOUR PROXY CARD AT HAND. GO TO THE "VOTE YOUR PROXY HERE"
    LINK ON THE WEBSITE WWW.MSDWT.COM OR WWW.PROXYVOTE.COM. ENTER YOUR
    12-DIGIT CONTROL NUMBER LOCATED ON THE PROXY CARD AND FOLLOW THE SIMPLE
    INSTRUCTIONS.

 3. BY TELEPHONE. HAVE YOUR PROXY CARD AT HAND. CALL 1-800-690-6903 ON A
    TOUCH-TONE PHONE. ENTER YOUR 12-DIGIT CONTROL NUMBER LOCATED ON THE PROXY
    CARD AND FOLLOW THE SIMPLE RECORDED INSTRUCTIONS.
- --------------------------------------------------------------------------------


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