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Registrar service crashes on a Lync Server 2010 server that has SBA or SBS deployed in branch sites

Assume that you have branch sites in the topology of a Microsoft Lync Server 2010 environment. You deploy Survivable Branch Appliances (SBA) or Survivable Branch Servers (SBS) to the environment. In this situation, the Registrar service (RTCSrv.exe) may crash on a Lync Server 2010 server in the environment. 
This issue occurs because the Registrar service encounters an access violation when the Registrar service tries to register a branch user whose home server is set to a branch site.
To resolve this issue, install the following cumulative update:
2791381 Description of the cumulative update for Lync Server 2010: March 2013
More information
For more information about how to deploy a Survivable Branch Appliance or Survivable Branch Server, go to the following Microsoft website:For more information about the Survivable Branch Appliance and the Survivable Branch Server, go to the following Microsoft website:

Article ID: 2796755 - Last Review: 03/14/2013 16:21:00 - Revision: 1.0

Microsoft Lync Server 2010 Enterprise Edition, Microsoft Lync Server 2010 Standard Edition

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