XIMS: Cannot Change Nickname After Default Has Been Assigned

If you join a channel on a Microsoft Exchange Chat Service computer or change your nickname in a channel you have already joined, and you specify a nickname that is already being used, you are assigned a default nickname. If you attempt to change your nickname after you have already been assigned the default nickname and you specify another nickname that is already being used, the command may fail, and the server may end the connection unexpectedly.

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: The English version of this fix should have the following file attributes or later:

Component: Chat Service

Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.