Dear ISA Profs!!! I installed a standalone ISA server as a gateway between my AD domain and a Squid Proxy. When i create a rule for certain AD users (which i select) en i press OK i get the following message: The Processing of %username% failed with the following error: "The specified domain either des not exist or could not be contacted." I made sure that the server is a member of the domain and that the IP setting (DNS Servers) are correct. This al works fine. Afterwards i get a message in my event log saying Event ID: 1000 Source Userenv User: NTAuthority\System "Windows cannot determine the user or computer name. Return value (1722)". I just want to solve this issue before i install Eterprise edition as a solution. Any Idea anyone? Cheers.