Server 1: Exchange 2003 Server 2: Exchange 2007 CAS/HUB I have Exchange 2007 installed and the CAS works to the Exchange 2003 server fine while forms authentication is set to require domain\username. If I change CAS to only require a username and I select the domain, and restart IIS, when a 2003 mailbox user logs in, OWA only partially loads, I get script errors and images are not showing. The OWA on the Exchange 2003 server is setup for Basic Authentication. To use the E2K7 Cas without requiring a domain, would I need to change the 2003 OWA to integrated authentication at that point? TIA
