You need to ensure that the Client Computers that have Office Communicator 2007 R2 installed can use IM and Presence and can join Web Conference Hosted on Lync Server 2013.
The solution must minimize Administrative effort.
What should you do?
A. Modify the Client Version Policy allow all versions of office Communicator 2007 R2 to connect
B. Implement Communicator Web Access Server
C. Apply the latest hot fixes to Office Communicator 2007 R2.
D. Update the computers to Lync 2010
