SSL Certificates in plesk seem to be a bit of a pain in the bum. The option to secure the control panel is not somewhere obvious (if you ask me) and to secure email connections you have to start digging around in a terminal. Now, whilst I don't mind that I appreciate that other people may not be quite as happy...
So, to secure your control pannel in plesk first make sure you have a current, valid, signed certificate. I won't go into how to do this just yet, maybe that's a post for another week.
Once you have the certificate from the left hand menu goto;
server management ->tools and settings
then under head to
tools and resources -> ssl certificates
Find the ssl certificate that you want to use to secure the control panel (check it's the one with the hostname of the server), tick the check box on the left hand side
Head back up the page until you hit the blue bar with "remove ssl certificate" and "secure the panel" and "make default for websites. Click "secure the panel".
It's fairly obvious when you know how but it takes me ages to remember where that bloody button is.
The next bit we need to do is secure the mail server side of things.
