Your network has Lync Server 2010 deployed.
You need to ensure that when users on the PSTN receive calls from users in your organization, the calls display the telephone number +14255551212.
What should you do?
A.
From the Lync Server Management Shell, run the Set-CsVoicePolicy cmdlet.
B.
From the Lync Server Management Shell, run the Set-CsCpsConfiguration cmdlet.
C.
From Lync Server 2010 Control Panel, edit the Route settings.
D.
From Lync Server 2010 Control Panel, create a workflow for a Response Group.
Explanation:
http://technet.microsoft.com/en-us/library/gg412966.aspx