Entourage 2004, Outlook 2003 and Exchange 2003 - Shared Calendars

[Chuck]

Good afternoon,

If aynone can help with my problem, you might prevent me going mad.

At present we have a SBS running Exchange 2003 SP2. I have 6 PCs are
members of the domain Richmond and are all running Outlook 2003. I have
about 15 Macs running OS 10.4.8 with Entourage 2004 (11.2.5). I also
have another 15 PCs running XP SP2 and Outlook 2003.

The 15 Macs and 15 PCs are NOT members of the Richmond domain but all
have accounts on the Exchange server.

My problem is that the Mac users cannot see any shared calendars apart
from on the PCs that are joined to the domain. The 6 PCs on the domain
can see any shared calendar on the network be it on a PC or Mac. The
PCs that are not on the domain can see all calendars too. It is just
the Macs that cannot see each other's calendar or those of the PCs that
aren't on the domain.

It does appear that a number of calendars can be accessed through OWA
(putting the address and full mailbox name into the address bar) but
this is far from ideal. I've tried with different permissions and
delegations settings but to no avail.

If anyone can shed any light on this issue, please help!

Thanks

Mark