I'm not sure what happened here.  This web application was running fine or years and now suddenly it is logging people off at random times.  Either it happens as soon as you log in, or it takes a couple minutes. It doesn't matter if you are actively using the site or idle, you don't get anywhere near the expected 20 minutes of idle before you get logged off.

I've done some looking and it appears that the application uses "InProc" cookies to keep track of user sessions, but no matter what I do, I cannot keep the sessions from expiring randomly.  The app supports IE 7-9 I believe, but the issue occurs in firefox as well. I have removed and reinstalled the application with no luck.  I have copied web.config from working envionments and stil the issue persists.

Has anyone, more familiar with cookies and sessions than me, seen this behavior before or have any suggestions to help locate the issue?

T

I'd ask in Microsoft IIS forums here

http://forums.iis.net/