Authenticating Users with Windows Authentication while developing an MVC application

When you create a new ASP.NET MVC application, Windows authentication is not enabled by default. Forms authentication is the default authentication type enabled for MVC applications. You must enable Windows authentication by modifying your MVC application's web configuration (web.config) file. Find the <authentication> section and modify it to use Windows instead of Forms authentication.

<authentication mode="Windows">

</authentication>

When you enable Windows authentication, your web server becomes responsible for authenticating users. Typically, there are two different types of web servers that you use when creating and deploying an ASP.NET MVC application.

First, while developing an MVC application, you use the ASP.NET Development Web Server included with Visual Studio. By default, the ASP.NET Development Web Server executes all pages in the context of the current Windows account (whatever account you used to log into Windows).

The ASP.NET Development Web Server also supports NTLM authentication. You can enable NTLM authentication by right-clicking the name of your project in the Solution Explorer window and selecting Properties. Next, select the Web tab and check the NTLM checkbox. (There may be some minor differences as per the Visual Studio Installed in your local System)