Outlook clients disconnected from Exchange
Event ID 9646 is occuring in SBS Application log. The users Outlook reports that it is Disconnected from Exchage. Checking the Logons list in Exchange System Manager shows 32 sessions open.
After this limit is reached further logons are disabled to prevent performance issues. There are apparently registry entries to increase this limit (coulnd't dfind them in SBS 2003 - different reg hive?) but the cause is a much more interesting problem to understand and resolve. IT'S A CABLE FAULT!
The problem here is not with the server itself but the client that is connecting to the Server. The disabled user has an underlying network issue that is causing them to get disconnected from the server. In this case this user is the only one using a wireless connection that is obviously not as relaible as hoped. Turns out the network point/cable for that user is faulty and hence they are failing over to wireless connections.
- dubno's blog
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