Win Update patch affects outlook 2K refreshing messages?

After installing WSUS and releasing several updates, incoming emails are not
refreshing in Outlook 2000. The user must click on something in outlook and
then they will refresh in the inbox......We use Exchange 2000. this is
affecting updated computers only......So I doubt its a coincidence.......Does
anyone know of any known bugs in an outlook or patch that would do this? This
affects clients running Outlook 2000 on Windows 2000 and Windows XP
professional.

I will post this in the outlook forum as well.

Thanks,
Dave
MCSA