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Outlook 2007 randomly losing connection to exchange 2007

Posted on 2008-10-22
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Last Modified: 2012-05-05
Hi there, we are running a flat topology in terms of LAN. Have got an Exchange 07 server and clients running Outlook 2007. On couple of occasions there are random connection problems.
Whilst running a continous ping without any timeouts, the mailbox lose its connection to the server and so a message "Trying to connect to Microsoft Exchange" appears. It takes 40 seconds or so until the connection restores, than usually after few minutes it happens again.

Cached mode is in use, so we have re-created those 2 ost files, problem still persists.

Any ideas?

Cheers,

NC.
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Question by:supportemea
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Expert Comment

by:WilyGuy
ID: 22775132
If it is a regular occurrence, try a ping -t to the Exchange server from the client PC (maybe another ping -t to the DC) for a little while to see what is happening to the network during that time.  I see you did a continuous ping, but to what?  Maybe no ping timeouts, but did it get slower?  Did you increase the packet size in the ping?

If you don't get any network dropouts during that time, you have eliminated the network.  You could then try non-cached mode to see if Outlook is really dropping.

Finally you may want to run a process monitor to see if something else is happening at that time.
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by:supportemea
ID: 22777437
Thanks WilyGuy,

I did try the continous ping to the exchange server and no, it didn't drop at all. I will try to increase the packet size and see if it makes a difference. I doubt it, as I mentioned before, we use a flat 1GB LAN.

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Expert Comment

by:WilyGuy
ID: 22777665
the ping to the DC (from Exchange AND the client) could indicate if there is an authentication issue going on that is manifesting as a dropped connection.
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supportemea earned 0 total points
ID: 23048453
This seem to be profile related. In all cases we've had that, clearing the profile cache and re-create it cured the drpped connections.
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