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Exchange Server un/available over T1

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by pbtoms 2 views

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We just added point to point T1's between a couple of our offices, and set up Outlook 2003 to connect to our Exchange 2003 server in the main office. Works fine, most of the time. I have 2-3 users though with a problem. When they first start Outlook in the morning it says "your Exchange Server is unavailable" and won't connect. They keep hitting "retry", and/or close outlook and start it up later, and eventually it connects. Once it connects, it works fine all day. Sometimes that retry process takes 5 minutes, sometimes 20. Sometimes it connects on the first attempt. I changed the server timeout to 60 seconds, but they got the "unavailable" error in less than 20. It doesn't appear to affect everyone in that office, just a few of them, and it is sporadic. Any ideas where to start troubleshooting?

5 replies

by pbtoms

Haven't done an official bandwidth analysis (not entirely sure how to go about that in any effective way, actually), but I don't think it's an issue. We can move files back and forth, Remote Desktop/Terminal sessions run fine, all indications are that the T1 is running fine. Also, it only happens to a couple of people, if it was a bandwidth issue (i.e. everybody is logging on at the same time and jamming up the connection), it would affect more people, or at least different people, wouldn't it? (Sorry for the "unacceptable", needed to comment.) If bandwidth clogging could be the issue, I'll figure out how to check that...

by jguasch

Do you ahve a firewall in between.. when they cant connect, can they ping the mail server? DNS issues maybe?

by pbtoms

No firewall, it's a straight point to point to the main office, then goes through a firewall to the internet, but the office connections are behind the firewall. They use the same DNS server that the main office uses, and the other branch office is set up the same way. Only 3 people in one office are having the problem. I'll have them try the ping. They ARE able to ping the mail server, but I'm not sure they've tried while getting the 'unavailable' message. (Again, sorry for unacceptable. Post again to get your points...)

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