Assume that a Microsoft Lync 2013 user is enabled for the remote call control (RCC) feature. The user signs in to a Lync 2013 client. In this situation, the client crashes.
This issue occurs because Lync 2013 incorrectly handles an internal time-out when it sends the "Call Forwarding" request to the CSTA gateway.
To resolve this issue, install the following cumulative update:
2825630 Description of the Lync 2013 update 15.0.4551.1005: November 7, 2013