Fixes an issue in which a user cannot join a Lync 2010 conference until the meeting join page is refreshed. This issue occurs after update 2500441 is installed in a Lync Server 2010 environment.

Fixes an issue in which a Front End Server that has the Collocated Mediation Server option enabled does not route network traffic to Lync 2010 Mobile clients in Lync Server 2010.

Describes the cumulative update for Lync Server 2010, Unified Communications Managed API 3.0 Runtime that is dated April 2011.