Exchange 2007 converts .WAV to .MSG

I have an Exchange 2007 server.  My phone system is currently doing voicemail to email.  The normal activity is the phone server sends an email with a WAV attachment to the proper recipient for voicemail.

Recently, when the phone system sends the email with WAV attachment the email server is somehow converting the WAV attachment into yet another email and attaching this 2nd email and sending it.  To clarify, what we receive from exchange now is an email with an attachment, but the attachment is a .MSG.  If I open the .MSG attachment the WAV file is attached within it.

What I noticed was in Outlook the email from the phone server is now classified under the following:

Message Class: Message (Microsoft Voicemail UM)

What is causing this??  Please help, my mobile phone users cannot open these attachments and receive their voicemails anymore!!
BSModlinAsked:
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B HCommented:
have a look at the accepted answer here:
http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/Q_24064658.html

i think that'll get you fixed up too
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BSModlinAuthor Commented:
The answer above did not work.  I tried in safe mode and got the same result and if I try to access to the mail via OWA it is the same as well.  That is leading me to believe that it is not an Outlook issue, but I am not ruling it out either.

Attached is a test Voicemail so you can see the issue.
Voicemail-Message--MODLIN-BRIAN-.msg
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B HCommented:
can you send yourself a wav attachment, and see what happens?  this is to rule out anything the phone system is doing
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BSModlinAuthor Commented:
That works fine!!  How would Exchange know that the email coming from the phone system is a phone system?  Why does it classify that email under unified messaging?
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BSModlinAuthor Commented:
Could this be an Outlook Rule that is somehow being managed by the Exchange Server?  
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B HCommented:
no i dont see how exchange or outlook would affect it, if it works as a test from yourself... we need to start looking at how the phone system is attaching the wav file

can you provide any details about the phone system?
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BSModlinAuthor Commented:
It is Avaya IP Office v5 and Voicemail Pro setup to send voicemails via SMTP to my mail server.
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BSModlinAuthor Commented:
As a side note, I had my Avaya Support look into this and they setup a test environment with the same version of IP Office and theirs is working properly.
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B HCommented:
well, from what i see of your attachment, it's adding a second tab to the emails... on the second tab, is the wav attachment


untitled.bmp
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BSModlinAuthor Commented:
Correct, but the phone system used to send the attachment as a WAV file without the original tab.  The issue besides having an extra step is the fact that Blackberry users cannot open the .MSG attachments to get to their VM. Something changed.....
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B HCommented:
this may be a new "feature" of a recently installed exchange update or service pack -

unfortunately it's straying a bit from my expertise... i would suggest you make a new question, pick more zones, and either include all this info or link to this thread.  as this question is days old and has several comments, most experts won't even look at it now... but with a new question you'll be seen by hundreds of experts again right away.
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craig_j_LawrenceCommented:
I would take a look at your voicemail pro settings, if you are using a mapi connection to Exchange, the message type may be set as a um message, and therefore a different form is used. I am not an expert with the avaya voicemail system, but I would suggest that you take a look at the following site: http://www.carrollcommunications.com/vmpro/changesmtp.html
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