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Outlook 2003/Exchange 5.5 connection issue

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INArtCtr

Technical User
Nov 14, 2002
37
US
I have a strange intermittent problem which has popped up for no apparent reason -- we use Outlook 2003 on workstations connecting to Exchange 5.5 on an NT 4 server. This morning, about 1/3 of the stations had problems connecting to Exchange. They are connected to all other programs on the network successfully, including the internet. Outlook sits there for a long time, trying to connect, when the error message pops we, we hit Retry and the connection is eventually made. However, the connection tends to go off and on, off and on. I have run a virus scan, checked for spyware, run Detect and Repair, cleaned up files on the hard drive, changed the user to an Admin account, and checked the size of their mailbox. Eventually, the connection seems to stabilize if you leave the system alone for an hour or so. No changes were made to these systems or the netwrok recently, local caching is off as is Windows Firewall. The problem machines are clumped at one end of the office, but because their overall connectivity seems fine, I doubt it is a cable problem. Any thoughts?
 
INArtCtr,
last time you rebooted the xchange box? i've seen similar things happen when the stacks get kinda currupted.
regards,
longhair
 
Longhair -- I did a full reboot on Monday when everyone was out, and then warm booted this morning. I was thinking of doing a full reboot again at lunch today.
 
INArtCtr,
keep an eye on the box to see what's going on. any big emails going out or coming in? do you run any antispam software on it? i've also seen symantec software 'choke' on some large files and slow the entire box down.
do you have a different port on your hub that you can plug the xchange box into? do all network connections go through the same router / hub / switch?
regards,
longhair
 
Longhair - No big messages moving through that I can see, in fact, one of the boxes has very little in it. I did uninstall the anti-spam on this machine, seemed to make no difference -- We use CA's antivirus, not Symentec, so not an issue there. All connections go through the same router, but we do have two switches -- thanks for that idea -- I will check it!
 
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