We installed ISA server a few days ago and are now learning, testing and trying to "understand" it. What have we done so far is simple. We created a content rule based on my username for one (1) user (myself) that restricts me to *.be sites. That was easy and indeed, I could only surf to *.be sites. BUT! On a regular basis authentication windows pop up. When I hit the cancel button the downloading proces of the site continues but after a few seconds I get the same window. Is there any possible solution for this not so "hidden feature"?