Fax communication sessions are dropped by an Exchange Server 2007 Unified Messaging server

Article ID: 979338 - View products that this article applies to.
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SYMPTOMS

If you use a Microsoft Exchange Server 2007 Unified Messaging server to receive faxes, some fax communication sessions are dropped by the Unified Messaging server. Therefore, some faxes are missing.
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CAUSE

The fax communication sessions may include empty data fields, which is ordinary. However, the Exchange Server 2007 Unified Messaging server does not recognize the empty data fields. Therefore, the Exchange Server 2007 Unified Messaging server ends the connection by sending a Session Initiation Protocol (SIP) "BYE" during the fax transmission.
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RESOLUTION

To resolve this issue, install the following update rollup:
2530488
(http://support.microsoft.com/kb/2530488/ )
Description of Update Rollup 3 for Exchange Server 2007 Service Pack 3
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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MORE INFORMATION

For more information about Exchange Server 2007 Unified Messaging server role, visit the following Microsoft website:
General information about Exchange Server 2007 Unified Messaging server role
(http://technet.microsoft.com/en-us/library/bb123911(EXCHG.80).aspx)
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Properties

Article ID: 979338 - Last Review: March 31, 2011 - Revision: 4.0
APPLIES TO
  • Microsoft Exchange Server 2007 Service Pack 3
  • Microsoft Exchange Server 2007 Enterprise Edition
  • Microsoft Exchange Server 2007 Standard Edition
Keywords: 
kbfix kbqfe kbhotfixrollup kbsurveynew kbexpertiseinter KB979338
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