Microsoft Windows Server 2008: Windows authentication

1. Start the option Programs and Features from the Control Panel.
2. Select the option Turn Windows features on or off.
3. Open the following path in the Server Manager tree: Roles > Web Server (IIS).
   

   
   

4. Check if the Role Service Windows Authentication is installed. This is located under Web Server > Security.
   

   
   

5. If this Role Service is not installed, install it using the button Add Role Service at the top of the list.