New messages don't display in Outlook

[Eric Weller]

In our Exchange 5.5 environment, we frequently have
Outlook 2002 clients that will not received a refreshed
view of their inbox when messages arrive. A message is
delivered to their inbox, and can be seen from another
client on another machine, but the problem client won't
see a copy of it until they perform some action in
Outlook that will refresh their view, such as change
folders, or start a new message.

We are NOT using offline files.
We do NOT have "disable automatic send/receive" checked.
Some computers have an automatic send/receive set, most
do not....it doesn't seem to make a difference either way.

Any thoughts are appreciates.

 

[Jeff Stephenson [MSFT]]

The problem you're having is that the information (called "UDP packets")
that Exchange is sending to notify Outlook of changes to your mailbox is
being blocked by something. Possible culprits are proxy servers, firewalls,
and routers. Have your network administrator look at
http://support.microsoft.com/default.aspx?scid=kb;en-us;815052 and see if
that might be the problem. If you can't solve the network problem, you can
set the registry values in
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q305572 (Outlook
2002) or http://support.microsoft.com/default.aspx?scid=kb;en-us;Q304849
(Outlook 2000) to cause Outlook to poll Exchange rather than waiting for
notifications.