Nov 01, 2012 10:35 AM|bbcompent1|LINK
Much is going to depend on whether you have this other domain hosted in-house or a service provider. This link might give you some clues on how to do this but I can assure you it isn't without its own level of pain. What you essentially want to do is make
the DMZ domain a part of your forest, then syncronize the accounts accordingly. You can use Organizational Level permissions to sort whether a user is internal or DMZ.