Topic Last Modified: 2011-04-07

Your Mediation Server is merged into your Lync Server 2010 pilot topology when you run the Merge wizard. You configure the Lync Server 2010 Mediation Server, however, after all users are migrated because an Office Communications Server 2007 pool cannot communicate with a Lync Server 2010 Mediation Server. During the side-by-side migration, the Lync Server 2010 pool communicates with the Office Communications Server 2007 Mediation Server.

When you configure your Lync Server 2010 Mediation Server, you must also upgrade or replace your Office Communications Server 2007 gateways. Office Communications Server 2007 gateways do not support Lync Server 2010 Mediation Server. You need to deploy gateways that are certified for Lync Server 2010 and associate them with the Lync Server 2010 Mediation Server. For details about deploying gateways, see Define a Peer of the Mediation Server for a Site in the Deployment documentation. This step is required before you can completely decommission your Office Communications Server 2007 deployment.

The topics in this section describe configuration tasks that you need to perform after you have completed your migration of Microsoft Lync Server 2010 Mediation Server. Transitioning a collocated Mediation Server to a stand-alone Mediation Server is an optional task.

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