I have a remote office that keeps losing connection with the exchange server. All my other locations seem to be fine. But this one location, messages sit in outbox and don't go, and when trying to send it loses connection with exchange server. I can close outlook and reopen it and it says connected. They are all XP machines running in exchanged cache mode. Any help would be appreciated.. thanks in advance

Okay, Checked event log and found something interesting. I am getting a event id error 9646, saying that particular user mapi session has exceeded the max. amount of 32 cat session. So i changed the registery to allow 250 sessions. However, i am still getting this error AND its all the users at the location that keeps losing the connection with the exchange server?

I've come across this before. Download and run TCPView on your exchange server. Sort by IP address, find the IP for the user having the excessive sessions. Highlight all the sessions and end the processes. Have them restart their Outlook client and they should be fine.

Hi. Does your remote office have a own domain controller? Is there firewall between your main office and this branch office?

below post wil help you out: http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/cf3dce7c-dac3-40c8-8b11-0ae8ed14ac6d/ or Here are few things may be responsible 1) OST 2) Network Please investigate Network from your network support. Remove exchange cached mode and see if outlook works fine if yes remove the OST file and then put outlook to exchange cache mode again here is the link to remove OST file http://office.microsoft.com/en-us/outlook/HP052422641033.aspx Dinesh