Likely an issue with the firewall update SP2 includes. New mail
notifications rely on UDP connectivity which may have ben altered by the
firewall update:
http://support.microsoft.com/?kbid=815052
Windows XP-Based Clients Do Not Receive "New Mail" Notification Messages
After You Install Service Pack 1
Hal

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Hal Hostetler, CPBE -- hhh@kvoa.com
Senior Engineer/MIS -- MS MVP-S/U -- WA7BGX
http://www.kvoa.com -- "When News breaks, we fix it!"
KVOA Television, Tucson, AZ. NBC Channel 4
Still Cadillacin' - www.badnewsbluesband.com
> I have several users using Outlook 2000 on an XP Professional SP2 machine to
> contact an Exchange 2003 mail server. Since installing SP2 on their desktop
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>
> Thanks
Liam M - 11 Jan 2005 12:11 GMT
Thanks for that. It did turn out to be the SP2 firewall blocking UDP. I
also finally located a TechNet article on the subject (839226) although I
haven't been able to find that reference online, only on our subscriber
disks.
Essentially to fix it you have to add Outlook to the list of Exceptions in
the firewall. I set the scope to the subnet of our mail server, applied the
policy and clients got their notifications again.

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Liam
> Likely an issue with the firewall update SP2 includes. New mail
> notifications rely on UDP connectivity which may have ben altered by the
[quoted text clipped - 16 lines]
>>
>> Thanks