We r buying SBS 2008 Primium edition in order to sysnchronies our outlook mail with Exchange srver. 1-Can we use Exchange server bundle up with SBS 2008 Primium without installing Active Directory? 2-Can we able use exchange server with dummy domain. 3- Can we use pop3 accounts configured in outlook to sysnchronies with exchange server.

I would ask these in the SBS forums: http://social.technet.microsoft.com/Forums/en-US/smallbusinessserver/threads