Your company has a main office and a branch office. Both offices are connected directly to the Internet. The branch office Internet connection has limited bandwidth. The company deploys Microsoft Lync Online. You need to ensure that branch office users can use only the instant messaging feature of Lync Online and cannot connect to audio or video conferences. What should you do?

A. From the Office 365 Portal, modify the user properties of each branch office user.
B. From the Office 365 Portal, configure the license settings of each branch office user. C. On the branch office firewall, block all outbound traffic on port 5061.
D. Deploy only the Microsoft Lync 2010 Attendee client to the branch office users.

Correct Answer: A