The following instructions explain how to install an SSL certificate on Plesk version 10/12.
Log in to your Plesk Control Panel.
From the left menu, select Domains and click the domain name for which you want to install the certificate.
Then select SSL Certificates and click Add SSL Certificate.
Under Upload the certificate files search for the required files (Browse...) on your PC.
Private key (*.key) - server.key
Certificate (*.crt) - yourdomain.crt
CA certificate (*-ca.crt) - yourdomain.ca-bundle
Confirm the upload of the certificate by clicking on "Upload Certificate".
Next open the Hosting Settings under Home -> Domains -> Hosting Settings
Under Security, check SSL Support and select the certificate from the pull-down menu.
Confirm the settings by clicking on the "Apply" button.
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