Symptoms

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. 

Cause

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.

Resolution

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:

How to deploy a Survivable Branch Appliance or Survivable Branch ServerFor more information about the Survivable Branch Appliance and the Survivable Branch Server, go to the following Microsoft website:

General information about the Survivable Branch Appliance and the Survivable Branch Server

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