Generate a CSR: Plesk
To generate a Certificate Signing Request (CSR), please do the following:
Log in to the Plesk Control Panel. Click on the Domains button. Then, the Domain List page will appear.
Click the domain name that you want to secure with SSL.
Click the Certificate button. Then click add button and the SSL Certificate setup page will appear.
Enter the relevant information in the Certificate Information section. (ALL fields with * must be completed).
Click on the Request button displayed to the right of your details.
Plesk will now email your CSR to the email address provided when you signed up. You will see that the email contains two sections – the RSA Private Key and the Certificate Signing Request. Do not lose your RSA Private Key, you will need this later.