I have a website running on IIS7 and part of the applications has a document repository that works via url rewriting. I am using windows authentication. mysite.com/documents/folder1/mydoc.doc The users are getting a windows logon now that they are using Windows 7 and IE8. This is intermittent. Pressing cancel in the logon prompt just lets it go through. It does not seem to actually matter if you logon or not. The files do not actually exist in the file system. They are pushed out via http. When a user selects a file the open, save, cancel dialog appears. When they press open it eventually asks for a logon intermittently. (but ignoring the logon by pressing cancel seems to just let you pass through). When go through with the save button is saves and opens with no logon request. What is causing this? What do I do to stop it? My app pool is .NET 4.0 and running as classic and not integrated.

Hi, First, please make sure Automatic Logon is checked in Internet Explorer and if you donot want IIS to prompt for crendential, please enable Windows Integrated. Since your question is related to IIS settings, I suggest posting a new thread at http://forums.iis.net/default.aspx/39?General if you have further question on this. If you have any feedback on our support, please clickhere Juke Chou TechNet Community Support