Consider the following scenario:
- You enable user A and user B for Microsoft Lync Server 2010.
- User A is not a member of any Group Chat room in the environment. User B is added to a Group Chat room.
- You add a distribution list (DL) as a member to a Lync Server 2010, Group Chat room. You enable this chat room to send invitations to new members.
- You add both user A and user B to the DL.
- Both user A and user B sign in to Group Chat.