Article ID: 2621832 - View products that this article applies to.
You run a Microsoft Unified Communications Managed API (UCMA) endpoint on a Lync Server 2010 server. In this situation, you might find the following call flow in the trace log during a blind transfer that involves an UCMA endpoint:
This issue occurs because the Mediation server ignores the SubscriptionTerminated event. Therefore, an exception is caused when the NOTIFY message is sent, and then the call is ended.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2640253 / )Description of the cumulative update for Lync Server 2010, Mediation Server: November 2011