Cannot edit or create certificates

I am using ClearOS Community release 6.9.0 (Final) and I am getting a certificate warning when I login to Outlook. I states that my localhost.localdomain certificate is out of date, witch it is. Outlook works fine but, I have answer yes to two popup warnings about the certificate not being able to be verified.

When I open the Clear OS console and choose Certificate Manager under System, I do not see an option to edit the certificates that are already there nor do see an option to create a new certificate. I know a little bit more than nothing about certificates so I pretty sure I'm doing something wrong.

Any help on how to get the options to edit or create certificates would be appreciated.