Anything in your app event logs, such as msexchangeal 8331 errors?
See KB 837444 if so. SP1 fixes this but there's also a hotfix you can get
(free) if you call MS.
> "I created a few new mailboxes, but when I look at the
> users properties in Active Directory Users and Computers,
> nothing is listed on the Email Address Tab. I also
> manually updated the RUS in the Exchange Suystem manager.
> It is more than 6 hours since the IDs are created, but
> still the e-mail field in the AD property is empty. The
> environment is Exchange 2003 in AD 2000 native mode.
> Can someone help me pls?