Your network has Lync Server 2010 deployed.
You deploy a common area phone.
You need to prevent users from enabling call forwarding on the common area phone.
What should you do?

A.
From the Lync Server Management Shell, create and apply a Client Policy.

B.
From the Lync Server Management Shell, create and apply a Voice Policy.

C.
From the Lync Server 2010 Control Panel, click Voice Routing, and then create a new PSTN Usage record.

D.
From the Lync Server 2010 Control Panel, click Voice Features, and then create a new Unassigned Number.

Explanation:
Voice Policy
http://technet.microsoft.com/en-us/library/gg412966.aspx