Your company uses a hosted Microsoft Exchange Server 2010 solution that has Unified Messaging (UM) enabled. You plan to deploy Lync Server 2010 at the company’s main office. You need to recommend a solution that integrates Lync services and UM. What should you include in the recommendation?

A.
a federation trust

B.
voice mail rerouting policies

C.
hosted voice mail policies

D.
Call Admission Control

Explanation:
A hosted voice mail policy provides information to the Lync Server 2010 ExUM Routing application about where to route calls for users whose mailboxes are located on a hosted Exchange service. (http://technet.microsoft.com/en-us/library/gg398932.aspx)