Configuring the Internet Information Services (IIS) -
Overview

The Internet Information Services (IIS) require a server certificate. This is an encrypted file in the format PKCS#12 (∗.PFX or ∗.P12), which contains the root certificate, all intermediate certificates, and a private key for the server.

These certificates are used to verify the components, the private key is used to encrypt the data in client-server communication via HTTPS.

When you specify a binding to the default website of the server, the installed certificate is activated and used for secure communications.