Shareholder Proxy Services
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                                                              September 15, 2009

                                IMPORTANT MATTER

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Re:  Pioneer Municipal High Income Advantage Trust (NYSE: MAV)
     Cusip: 723762100


Dear Shareholder:

Our firm has been retained by Pioneer Municipal High Income Advantage Trust to
contact you regarding your investment in common shares of the Trust, as of
record date July 9, 2009. We have attempted to contact you, but have yet to be
successful.

Please  contact  us   immediately  at   1-800-232-1064  between  the  hours of
9:00 a.m. and 11:00 p.m., Eastern Standard Time.

Thank you in advance for your assistance with this matter.


Sincerely,



Fred Bonnell
Investor Relations Supervisor
Shareholder Services
The Altman Group

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