Using IIS 7.5, IIS_IUSRS is supposed to be the account to use. I get '401 - Unauthorized: Access is denied due to invalid credentials' error. If I add an EVERYONE account with Read, it works. But rather not have Everyone account. Any idea why IIS_IUSRS does not work? It has Read access. Anonymous Access=enabled. Specific User=IUSR
As a side, on the Basic Settings... for the site, Test Settings button says 'ok-on Authenticate' but Authorization 'cannot verify access to path'.