Your network contains an Active Directory forest. The functional level of both the domain and the forest is Windows Server 2003. The forest contains the following servers:
* A server that runs Microsoft Live Communications Server 2005 Service Pack 1 (SP1)
* A Front End Server that runs Microsoft Office Communications Server 2007 R2
* An Edge Server that runs Office Communications Server 2007 R2
* A Mediation Server that runs Office Communications Server 2007 R2
* An Office Communications Server 2007 Communicator Web Access (CWA) server.
You plan to migrate all users to Lync Server 2010. You need to recommend changes to the network to ensure that you can deploy Lync Server 2010 to the Active Directory forest. What should you recommend?
A.
Raise the functional level of the domain to Windows Server 2008.
B.
Remove the Live Communications Server 2005 server and the CWA server.
C.
Remove the CWA server and the Edge Server.
D.
Raise the functional level of the forest to Windows Server 2008.
Explanation:
Migration is supported only from OCS 2007 or OCS 2007 R2. Entire OCS infrastructure must be of the same version. Also, migration from LCS 2005 is not supported. (http://technet.microsoft.com/en-us/library/gg425746.aspx)