Event ID 1001 after you successfully install the Exchange Server 2010 Unified Messaging server role

Article ID: 2514709 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • The Desktop Experience feature is not enabled on a Windows Server 2008 server, or on a Windows Server 2008 R2 server.
  • You install the Microsoft Unified Communications Managed API (UCMA) Runtime on this server.
  • You successfully install the Microsoft Exchange Server 2010 Unified Messaging server role on this server.
In this scenario, the Microsoft Exchange Unified Messaging service cannot start. Additionally, the following event is logged in the Application log:

Log Name: Application
Source: MSExchange Unified Messaging
Event ID: 1001
Task Category: UMWorkerProcess
Level: Error
Keywords: Classic
Description:
The UM worker process (UMWorkerProcess.exe) couldn't start. More information: A file couldn't be converted for playback over the telephone: An error occurred in the Audio Compression Manager: The operation completed successfully.

Note By default, the Microsoft Exchange Unified Messaging service is started after you install the Exchange Server 2010 Unified Messaging server role on a computer.
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CAUSE

This issue occurs because the Desktop Experience feature is required for the Exchange Server 2010 Unified Messaging server role installation. However, the prerequisites verification incorrectly passes in the scenario that is described in the "Symptoms" section.
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RESOLUTION

To resolve this issue, install the following update rollup:
2579150
(http://support.microsoft.com/kb/2579150/ )
Description of Update Rollup 4 for Exchange Server 2010 Service Pack 1
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WORKAROUND

To work around the issue, install the latest version of UCMA Runtime, enable the Desktop Experience feature, and then restart the Microsoft Exchange Unified Messaging service on the server.
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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 the Desktop Experience feature, visit the following Microsoft website:
General information about the Desktop Experience feature
(http://technet.microsoft.com/en-us/library/cc772567.aspx)
For more information about how to start the Microsoft Exchange Unified Messaging service, visit the following Microsoft website:
How to start the Microsoft Exchange Unified Messaging service
(http://technet.microsoft.com/en-us/library/bb124330.aspx)
For more information about how to install Exchange Server 2010 Unified Messaging server role, visit the following Microsoft website:
How to install Exchange Server 2010 Unified Messaging server role
(http://technet.microsoft.com/en-us/library/aa998002.aspx)
For more information about UCMA 3.0 Runtime, visit the following Microsoft website:
General information about UCMA 3.0 Runtime
(http://www.microsoft.com/downloads/en/details.aspx?FamilyID=418cc593-f31e-48be-957c-d3c9020c6b01)
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Properties

Article ID: 2514709 - Last Review: July 28, 2011 - Revision: 3.0
APPLIES TO
  • Microsoft Exchange Server 2010 Service Pack 1, when used with:
    • Microsoft Exchange Server 2010 Enterprise
    • Microsoft Exchange Server 2010 Standard
Keywords: 
kbqfe kbfix kbsurveynew kbexpertiseinter kbhotfixrollup KB2514709
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