You support a customer whose network environment includes Microsoft Lync Server 2013 Standard Edition and Edge Servers.
You create a group named HelpDesk.
You need to grant the minimum level of permissions necessary for members of HelpDesk to be able to enable or disable Lync users.
What should you do?
A. Assign the CsServerAdministrator role to HelpDesk members.
B. Assign the CsAdministrator role to HelpDesk members.
C. Add HelpDesk members to the group RTCUniversalServersAdmins.
D. Assign the CsUserAdministrator role to HelpDesk members.
