Server certificates contain information about the server that allows the client to positively identify the server before sharing sensitive information. After you obtain a server certificate from a trusted certification authority and install the server certificate on the Web server, you need to assign the server certificate to the Web site.
Credentials: Membership in the Administrators group on the local computer.
As a security best practice, log on to your computer using an account that is not in the Administrators group, and then use the Run as command to run IIS Manager as an administrator. At the command prompt, type runas /user:administrative_accountname "mmc ...