Hello everyone, we are trying to use ISA Server(s) as Cache Server for our Intranet (IIS 5). For the IIS integrated authentication is configured. Users are managed in an active directory. ISA Server(s) are configured as standalone Servers and to use integrated authentication also. The problem ist that now all request are denied with "authentication required" until we configure basic authentication for our intranet at the IIS, then the browser asks for the credentials and we can access our intranet. Does anyone have an idea what the problem is or where we can find an article or a book which may help us to solve the problem? Regards, Lothar