Your company has a main office and a branch office. Both offices are directly connected to the Internet.

The branch office connection to the Internet has limited bandwidth.
The company deploys Microsoft Lync Online.
You need to ensure that users in the branch office can only use instant messaging (IM) while using Lync Online. The users must be prevented from connecting to
audio or video conferences.
What should you do?

A.
On the firewall at the branch office, block all of the outbound traffic on port 5061.

B.
From the Office 365 portal, modify the user properties of each user in the branch office.

C.
From the Office 365 portal, configure the license settings of each user in the branch office.

D.
Deploy only the Lync 2010 Attendee client to all of the users in the branch office.