Equirements for this installation : www_example.crt and www_example.ca-bundle
- Login to your Plesk
- Navigating to > Domains > example.com > SSL/TLS Certificates and select Add SSL/TLS Certificate

- Type in the certificate name (you will use it to identify the certificate in the list of all certificates), then upload it as described below:
- If you store the certificate in the form of the *.key and the *.crt files, scroll down to the Upload the certificate files section and upload the files. If both the certificate and the private key parts of your certificate are contained in a *.pem file (you can check it by opening the *.pem file in any text editor), just upload it twice, both as the private key and the certificate. Click Upload Certificate when you have finished.

- If you store the certificate as text, scroll down to the Upload the certificate as text section and paste the certificate and the private key parts into the corresponding fields. Click Upload Certificate when you have finished.

- At the same page, select a required certificate for a website at Domains > example.com > Hosting Settings and click OK
- If you store the certificate in the form of the *.key and the *.crt files, scroll down to the Upload the certificate files section and upload the files. If both the certificate and the private key parts of your certificate are contained in a *.pem file (you can check it by opening the *.pem file in any text editor), just upload it twice, both as the private key and the certificate. Click Upload Certificate when you have finished.
- Enable SSL support at Domains > example.com > Hosting Settings

- At the same page, select a required certificate for a website at Plesk > Domains > example.com > Hosting Settings and click OK

For more information on installing SSL, please check with CA's website:
