Authentication issue when debugging in VS2013 - iis express

I had just upgraded to VS 2013 from VS 2012 and the current user identity (HttpContext.User.Identity) was coming through as anonymous.

I tried changing the IIS express applicationhost.config, no difference.

The solution was to look at the properties of the web project, hit F4 to get the project properties when you have the top level of the project selected. Do not right click on the project and select properties, this is something entirely different.

Change Anonymous Authentication to be Disabled and Windows Authentication to be Enabled.

Works like gravy :)

As I was researching this I found my answer, but can't find the answer on the internet, so I thought I'd share this:

I fixed my issue by modifying my applicationhost.config file. My file was saved in the "\My Documents\IISExpress\config" folder.

It seems that VS2013 was ignoring my web.config file and applying different authentication methods.

I had to modify this portion of the file to look like the below. In truth, I only modified the anonymousAuthentication to be false and the windowsAuthentication mode to true.

<authentication>

  <anonymousAuthentication enabled="false" userName="" />

  <basicAuthentication enabled="false" />

  <clientCertificateMappingAuthentication enabled="false" />

  <digestAuthentication enabled="false" />

  <iisClientCertificateMappingAuthentication enabled="false">
  </iisClientCertificateMappingAuthentication>

  <windowsAuthentication enabled="true">
    <providers>
      <add value="Negotiate" />
      <add value="NTLM" />
    </providers>
  </windowsAuthentication>

</authentication>