SSL Certificates Installation in Plesk Administrator
How to generate a CSR in Plesk 7
In the Plesk Server Administrator, click on Domains.
Choose the domain you are securing, and then the Certificate button.
Enter your DN information in the appropriate fields.
Click on Request.
The CSR will be sent to the email address you provided. You can open it with a text editor and the CSR will appear as a block of text. Copy and paste it into the DigiCert form (including the BEGIN and END tags).