title: WindowsAuthentication on ASPNET MVC 3 not working (IsAuthenticated always false)
body: <p>I'm trying to enable Windows authentication (setting windows mode on authentication) on a huge legacy ASPNET MVC 3 Application, but it isn't working and I can't find why; the Request.IsAuthenticated is always false. The app is very huge and has a lot of personalization with its own authentication and authorization system, but it uses the standard mechanisms of ASPNETMVC to override them (OnAuthorize). I've tried with empty controllers without &quot;personalization&quot; but it doesn't work neither.</p>
  <p>I don't know how to start to write here all configuration so, I'm expecting for a genius who could point me to what is wrong...</p>
  <p>I've tried too on a sampe new ASPNETMVC3 (from VS2010 templates) and it works fine; I would try to set every thing of my app on this one slowly to try to reproduce if I didn't found any solution before.</p>
  <p>--- UPDATE ---</p>
  <p>I've copied the web.config and global.asax of template project and it's not working yet. I've added the event WindowsAuthentication_OnAuthenticate on both projects and only enters on the demo project. I can't undersand how, where or why the ASPNET flow is broken.</p>