In doing an SBS install I ran into an intersting situation. I can reach any www site (e.g., www.isaserver.org) from any browser on the network--server or client. HOWEVER, I can't brows to ANY site that begins with "www.microsoft...". I get the following error message: HTTP 502 Proxy Error - Bad or unassigned address. For more information about this event, see ISA Server Help. (10049) Internet Security and Acceleration Server HOWEVER, I can get to any Microsoft site by NOT using WWW; e.g., http://microsoft.com. I can them move from site to site within Microsoft with no problem. I have never seen this kind of (to me at least) strange problem before. Any suggestions from someone who, unlike me, actually knows what he/she is doing?! Thanks!