Thanks Ruslan, That link was exactly what I needed for the query string problem. As for the session, the anchored regex pattern didn't help. This is what my redirect looks like now. <rule name="Redirect aspx to extensionless" stopProcessing="true"> <match url="(...

Does anybody know why the redirects break the session state? If I remove all the redirect rules I can use session state if I go directly to an extensionless url. So if I type in www.mydomain.com/directory/file the session state works fine and the url gets correctly rewritten. If I put in the redirect...