Microsoft KB Archive/235619

= XIMS: Clients Being Disconnected or Receive Channel Collision Messages from Microsoft Exchange Chat Service =

Article ID: 235619

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Service Pack 2

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This article was previously published under Q235619





SYMPTOMS
Chat clients may receive Channel Collision messages when joining a persistent channel or room. Or, they may be unexpectedly disconnected from a channel or room while connected to the Microsoft Exchange Chat Service.



CAUSE
A user has created a "rogue" channel with the same name as an already existing persistent channel using the "e" mode to clone the channel. This person thus becomes the channel owner, and all connected users are "kicked" from the room and receive Channel Collision messages when they try to rejoin.



RESOLUTION
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:

191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component: Chat Service



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5 Service Pack 2. This problem was first corrected in Exchange Server 5.5 Service Pack 3.



MORE INFORMATION
NOTES:
 * The "e" parameter in the Create command allows an owner or host of a channel that is clonable to clone it.
 * A channel is considered clonable if and only if the administrator of the chat server marks it as clonable--no one else can make a channel clonable.
 * Currently, Chat Server 5.5 only allows persistent channels to be marked clonable. Therefore, all dynamic channels are consider not clonable.

The only time this is a problem is if the channel name ends with a number, for example:


 * 1) Testing01


 * 1) Testing123


 * 1) Testing1

Additional query words: mcis

Keywords: kbhotfixserver kbqfe kbbug kbfix KB235619

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