Hello, I am a newbie designated to deploy Exchange 2003 just for email usage. We don't have Active Directory in place. Our registered domain name is jsums.edu. If I use a subdomain, let say ad.jsums.edu as root-domain for AD, can I still have the email address in the format user@xxxxxxxxx, instead of user@xxxxxxxxxxxx? I was thinking about an MX record on the public DNS server as "jsums.edu mailserver.ad.jsums.edu". Will this work? Thanks for any insight, Monika