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Error message when you try to add a user to a chat room in Lync Server 2010, Group Chat

Consider the following scenario:
  • You deploy Microsoft Exchange Server and Lync Server 2010 Group Chat in a Lync Server 2010 environment.
  • You enable user A for Exchange Server and Lync Server 2010. For example, you assign the Simple Mail Transfer Protocol (SMTP) address of "" and the Session Initiation Protocol (SIP) address of “” to user A.
  • You enable user B for Exchange Server. For example, you assign the SMTP address of “” to user B.
  • You add user A to a chat room by using the Group Chat administration tool.
  • User A signs in to the Group Chat client, and then user A chats or performs some activities in the chat room.
  • You disable user A for both Exchange Server and Office Communications Server 2007 R2, and then you remove the account from all chat rooms.
  • You change the SMTP address of user B from "" to "" You enable user B for Lync Server 2010 by using this new SMTP address and the SIP address of ""
You try to add user B to a chat room by using the Group Chat administration tool:
Unable to save the member list: [3] [322] Role <Member> for <ma-chan://> already contains >These principals are already defined on the node: <>

This issue occurs because the entry for user A is removed unexpectedly in the Group Chat database after you disable user A for Lync Server 2010.
To resolve this issue, install the following cumulative update:
2514984 Description of the update for Lync Server 2010 Group Chat: November 2011

Note You must delete the old account in Active Directory Domain Services (AD DS) before you install the update.

Article ID: 2600208 - Last Review: 12/09/2011 07:49:00 - Revision: 2.0

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