Some background: I've got a Win 2003/IIS 6 server on the intranet that is set to use "Integrated Windows Authentication", and "Enable Anonymous Access" is turned off.

For some strange reason I've been getting people here and there complaining about it prompting them for a username/password and not showing the content. Sometimes if they close the browser and try again it works fine. The only thing that ties all these reports together is that they seem to only get this error if they click on a link from an e-mail and the browser wasn't already open. (I'm still trying to teach about this neat new feature called "bookmarks", but some of these individuals need to start with more basic topics - like how to make a folder...)

Any thoughts as to why this is happening and what I can do about it?<