We are using 2 domains with 3 domain controllers and one domain is in the customer service center which is Domain A. The other domain controller sits in our development environment which is Domain B. There is also another domian controller in out Production environment which usually sits on the other side of a VPN and is connected to Domain B. The question that I am having is why cant the users authenticate to our development environment and not our production environment? Is this because of the lack of a VPN between customer srvc and production? If it is possible then how will I have the Domain A users to authenticate using AD via our development environment to get to a production web server without setting up a VPn from production to customer service? Can anyone please help? Thanks.