Topic Last Modified: 2011-04-05
Microsoft Lync Server 2010 works with Microsoft Unified Communications Managed API (UCMA) 3.0 Core SDK. If you have external applications built on UCMA 2.0 (which shipped with Office Communications Server), you can run these applications in an environment that includes servers running Lync Server 2010.
If you run a UCMA 2.0 application, homed on an Office Communications Server pool, you can enable users homed on a Lync Server 2010 pool to call into the application.
The trusted server entries are merged from the legacy Office Communications Server deployment to Lync Server 2010 when the Topology Builder Merge wizard is run. After the merge, the trusted service entries exist on both the Office Communications Server pool and the Lync Server 2010 pool, and no further steps are needed for coexistence. Be sure to note that this copies only the trusted service entries and route-related settings.