How to configure Windows Authentication / Impersonation + IIS 7 + MVC

I have a Windows 2008 server开发者_开发知识库 running IIS 7 and I'm trying to configure Windows Authentication and ASP.NET Impersonation, specifically for an intranet site which uses MVC. When a user hits the site from IE they are automatically logged to our site using the captured Windows username.

I have everything working in IIS 6 with:

• Anonymous access off

• Integrated Windows Authentication on, and:

  <identity impersonate="true"/> in the web.config.
  

In IIS 7, I can't seem to get it working, even in classic mode.

Under Authentication for the site in IIS 7, I have Windows Authentication and ASP.NET Impersonation enabled, everything else disabled. When I hit the site locally, it works. From a remote machine (on the same domain, using IE, loading it as an intranet site using the machine name i.e. http://servername/site/) I get challenged for my Windows credentials. Even if I enter in valid Windows credentials it fails, and clicking cancel gives me a HTTP Error 401, "The requested resource requires user authentication".

Turning ASP.NET Impersonation does not help anything. Any suggestions?

The problem turned out to be that the server had lost connection with the domain. I tried to remote desktop into the machine using my domain user account instead of a local admin, and I got the error:

The trust relationship between this workstation and the primary domain failed.

I remove the machine from the domain and re-added it, and after that both Windows Authentication and ASP.NET Impersonation work correctly.