Your network contains a Lync Server 2010 Standard Edition server.
All users have Microsoft Lync 2010 installed. All of the users use Lync 2010 to initiate IM conversations.
You need to prevent the users from sending instant messages that contain URLs that have an ftp prefix.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A.
From Lync Server 2010 Control Panel, modify the Global URL Filter settings.

B.
From Lync Server 2010 Control Panel, modify the Global External Access Policy.

C.
From Lync Server Management Shell, run the Set-CsTrustedApplication cmdlet.

D.
From Lync Server Management Shell, run the Set-CsImFilterConfiguration cmdlet.

E.
From Lync Server Management Shell, run the Set-CsFileTransferFilterConfiguration cmdlet.

Explanation:
http://technet.microsoft.com/en-us/library/gg182544.aspx

http://technet.microsoft.com/en-us/library/gg412960.aspx