Hi All I've heard from various sources that they recommend that Exchange 2000 be kept in a DMZ. However, I thought that doing so we would have to open up too many ports for Active Directory. What are your opinions for putting Exchange in a DMZ? Also, does anyone know which ports Exchange needs open to replicate with Active Directory? All opinions are most welcome. Mark, are you out there? :) Thank you, Jared __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html