Your network contains a server named Web1 that runs Windows Server 2008 R2. Web1 has the Web
Server (IIS) role installed. Web1 hosts a Web site that is accessed by using the URL
http://itweb.contoso.com. The server certificates for Web1 are shown in the exhibit. (Click the
Exhibit button.)

When you attempt to configure the SSL Settings for the Web site, you discover that the Require SSL
option is unavailable. You need to ensure that you can require SSL for the Web site. What should you
do?

A.
Run iisreset.exe /force.

B.
Configure the bindings for the Web site.

C.
Request a new domain certificate and specify Web1 as the common name.

D.
Request a self-signed certificate and specify itweb.contoso.com as the friendly name.

Explanation:

So one needs to add a Site Binding to HTTPS: