Note: Ensure that the domain name is resolved to a server IP address
1. Log in to Plesk.
2. Go to Domains and select the domain you want to secure. Click SSL/TLS Certificates.
Click on Reissue Certificate.
3. Click get it free in the Let's Encrypt section.
Select the required options:
Include the "www" subdomain for the domain and each selected alias
Assign the certificate to the mail domain
Note: Email address will be used to receive important notifications and warnings.
Click Get it free. This certificate is valid for the next 90 days and will be auto-renewed.
