Configure the authentication type
Complete these steps to configure the authentication type in IIS.
To configure Internet Information Services (IIS)
Open the Internet Information Services (IIS) Manager application.
Navigate to the required website.

Configuring Internet Information Services (IIS)—Internet Information Services (IIS) Manager
Double-click Authentication.
Right-click Basic Authentication and click Enable.

Configuring Internet Information Services (IIS—enabling Basic Authentication
Make sure the other authentication methods are disabled.