Problems viewing shared calendar when Office 2003 SP2 is installed.

[ml]

Hello there
I have a little problem with shared calendar in MS Outlook 2003 when I
install SP2.
The samarium is a Windows 2003 DC migrated from a 2000 and an Exchange
2003 migrated from a 2000, both installations on a new server.
We are using Office 2003 Pro and SB. Most of them are upgrades from
2000/XP.
All user calendars are shared with the some rights. When I take a newly
installed Office 2003 without SP2, I can see all information, when I
want to make a new meeting. When I install SP2 for Office 2003, I
can't see about 60% of all the users. This is a problem with all the
computers that have SP2 installed. It's the same users, which I'm
able to see on all the computers.
It's also a problem when I create new users in AD.
The funny part of all this is, than I have another costumer whit the
same installation, but here the Exchange server is not upgraded from a
2000, it's a totally new exchange installation. Here everything works
like it should. Also here I'm running Windows SRV 2003 STD, and the
users Office installation is new/or upgraded from 2000/XP.

I hope someone can tell me why Bill I screwing with me!

Thanks

Best regards
Michael Laursen