Turn off / Disable windows authentication for asp.net-mvc

1.) Close VS

2.) Remove the .vs/config or the .vs folder next to your solution. The IIS Express regenerates the config/applicationhost.config file. Changing this file does NOT help - it is regenerated

3.) Edit the <project>.csproj.user file. There change the lines

<IISExpressAnonymousAuthentication>disabled</IISExpressAnonymousAuthentication>
<IISExpressWindowsAuthentication>enabled</IISExpressWindowsAuthentication>

to

<IISExpressAnonymousAuthentication>enabled</IISExpressAnonymousAuthentication>
<IISExpressWindowsAuthentication>disabled</IISExpressWindowsAuthentication>

4.) Edit and change the web.config Change

<authentication mode="Windows" />

to

<authentication mode="None" />

or comment the whole authentication XML element.

The web config should overwrite the IIS express config but in this case it seems it does not. What you can try to do is to turn it off on the IIS level as well.

You can go to this directory \IISExpress\config\applicationhost.config open up this file and set the <windowsAuthentication enabled="false" />.