I have recently installed ISA 2004 sp2 on a Windows 2003 Server platform. ISA 2004 seems to have many improvements over ISA 2000, but I am having a problem with authentication. I have an Access Policy created that should allow all users who exist in a certain domain group unlimited Internet access. The rule stats that all traffic from the 'Internal' network and the 'Local Host' should be allowed to pass to the 'External' network if the user is a member of a domain group called "Internet Access". If I try to open IE and go to any Internet site, it is blocked ... the log shows activity from the local host to the site's IP address is "Denied" based on the Access Policy that I created. The username says "anonymous" which is why it is blocking ... if I allow "All Users" in this same Access Policy it works fine. I have gone into the security settings of IE and specified to use "current username and password". Why is it trying to access the site under "anonymous"? Any ideas? Thanks in advance!