Symptoms
Consider the following scenario:
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The Desktop Experience feature is not enabled on a Windows Server 2008 server, or on a Windows Server 2008 R2 server.
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You install the Microsoft Unified Communications Managed API (UCMA) Runtime on this server.
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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: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.
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.
Resolution
To resolve this issue, install the following update rollup:
2579150 Description of Update Rollup 4 for Exchange Server 2010 Service Pack 1
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.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More Information
For more information about the Desktop Experience feature, visit the following Microsoft website:
General information about the Desktop Experience featureFor 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 serviceFor 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 roleFor more information about UCMA 3.0 Runtime, visit the following Microsoft website:
