Windows Authentication not working on local IIS 7.5. Error 401.1
问题 I recently had a nasty issue getting Windows Authentication to work on a local instance of IIS 7.5 (Windows 7 Pro) to an ASP.net 4.0 site. I followed the basic steps. IIS Authentication Disable Anonymous Authentication Enable Windows Authentication Edit web.config <authentication mode="Windows" /> This did a nice job of enabling Windows Authentication but every attempt to login was rejected and ultimately returned a 401.1 error. This is where the problem started. There appear to be many