http://blogs.technet.com/b/seanearp/archive/2009/04/28/active-directory-in-the-dmz.aspxI’ve been waiting for this guide for a while (‘cause that’s how I roll), but if you are interested in guidance on when/how to use Active Directory in your perimeter network, the AD team has released a guide for that: Active Directory Domain Services inen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)