I am having an annoying issue with ISA at my office. I have a single BackOffice 2000 server running ISA (Standard) in integraged mode, in conjunction with the machine acting as my DC, Exchange server and SQL server. All clients are running Windows 2000 Pro SP-2 with all security patches run. I have a client address set created which covers my entire subnet, and all clients have the mspclient installed and active. The problem that I am having is two-fold. Let me explain the first issue: some clients are prompted with an authentication dialog after logging on to the domain. This logon box is for the FireWall on the server, however, no user name, password or domain name will allow access through, even the administrator can't get through at times. After being unable to authenticate, the user is redirected to an ISA 407 Error page (Authentication Required). Full Text {HTTP 407 Proxy Authentication Required - The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied. (12209)} The other problem that I have is that my internal Win2k domain is the same (bec-memphis.com with netbios domain name of bec-memphis) as my registered (and hosted) web domain (www.bec-memphis.com with the exception of the www). We also have the domain without the hyphen. Internal clients including the server can hit the domain if we put the unhyphenated domain name in the address bar, but with the hyphen in the domain name we get the same 407 error. Does anyone have any suggestions? I would appreciate any help. Thank you, Ian Sterling SysAdmin Business Equipment Center, Inc.