I have a BDC on an NT4 domain that I am trying to replace. I have built a new one and have it online and running. Is there a way to tell if any servers are using the old one for authentication on the BDC itself. Instead of going to each server. I want to bring the old one down but don't want to cause login issues if I do. _________________________________ Michael Boggan Network Engineer/Citrix Admin Virtual Desktop Inc. Dallas, Texas Ph: (972) 960-6400 Fax: (972) 960-6445 email: mboggan@xxxxxxxxxxx http://www.virtualdesktopinc.com <http://www.virtualdesktopinc.com/> _________________________________