So you've installed Windows Server 2003 SP2 on your ISA Firewall and now your external Outlook Web Access (OWA) clients are getting repeated authentication prompts. What's up with that? Looks like it's our usual suspect -- the Windows Server 2003 RSS bug! Who'd a thought the RSS bug would cause this problem? I didn't. The good news is that there's a fix for this. Go to: http://support.microsoft.com/kb/936702/en-us And you'll find the instructions on how to fix the problem.   read more »