Hello, I dont know if this would work with ADC. The NT4.0 server where I have installed the exchange 5.5, is in domain1 and a new win2k3 DC is in the new domain2. I already moved some computers and users to the new domain2 and I wanted to know if I can use ADC to connect to EXCHANGE 5.5 from the old NT4 DOMAIN1 and the new DOMAIN2 at the same time? I will eventually be getting a new 2k3 server with exchange2k3 next year. any suggestions, ideas, or comments will be helpful. thank you.