Article ID: 973340
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This article applies to the following product:
In Microsoft Office Communications Server 2007 R2, Group Chat Administration Tool, when you add new entries to the role list of a chat room or a category, you receive a message that states that the list cannot be saved because it exceeds the limit.
This problem occurs because the total number of the entries that define the roles is greater than 200.
To fix this problem, apply the following update:
969817After you apply this update, the 200 role limit is no longer imposed. The administrator should manage the permissions of the chat rooms by using Active Directory user groups where it is possible.
(https://support.microsoft.com/kb/969817/ )Description of the update for Microsoft Office Communications Server 2007 R2 Group Chat Administration Tool: July 2009
Note There is a memory and a performance penalty that is associated with a configuration that uses individual users to define the permissions for chat rooms.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.