Hi, I have problems using win2000 digest authentication settings in ISA.I keep getting the username/password window at the client's browser. The network is a lab and there are three machines in the internal interface of the ISA server(One win2000 domain controller, ISA server, win2000 client). I look at the domain controller's event viewer, and I get authentication failure message logged(with the ISA server requesting a login on behalf of the user).I can log into the domain from the client's workstation and the ISA server. Also I can get successful authentication with the basic clear text authentication, but not with the win2000 digest setting. I have installed all the service packs and updates. I would appreciate any response to this. Thanks Kiumars