The Web Site for the CA Must be Configured to use HTTPS
KB ID 0000838 Problem When attempting to contact a server running the Certification Authority Web Enrolment role, you may see the following error. In order to complete certificate enrolment, the Web site for the CA must be configured to use HTTPS authentication Solution The correct fix is to set the web server (IIS) to serve the certificate website securely using https, though you can just set Internet explorer to ‘work’...