SSL stands for Secure Socket Layer, it provides a secure data transfer channel with encrypted data. For SSL support you need a dedicated IP address for your website and a SSL certificate issued by an Authorized Certificate Authority (CA) like VeriSign or GeoTrust. To enable SSL support please follow the below steps.
Logging into the Plesk control panel using the URL https://yourdomain.com:8443.
Click the SSL Certificates icon in the Additional Tools.
Click Add New Certificate.

Specify the certificate properties
- Certificate name. This will help you identify this certificate in the repository.
- Encryption level. Choose the encryption level of your SSL certificate. We recommend that you choose a value more than 1024 bit.
- Specify your location and organization name. The values you enter should not exceed the length of 64 symbols.
- Specify the domain name for which you wish to purchase an SSL certificate. This should be a fully qualified domain name. Example: www.yourdomain.com.
- Enter the domain administrator's e-mail address.
- Make sure that all the provided information is correct and accurate, as it will be used to generate your private key.
- Click on Request to generate the CSR or click Self-Signed to create a self signed certificate.
- Click the Request button. Your private key and certificate signing request will be generated and stored in the repository.

Download the certificate signing request (CSR) file and save it on your machine. To do this, click the respective icon.
Once downloaded, open the file in a text editor, copy the text enclosed
in lines -----BEGIN CERTIFICATE REQUEST----- and -----END CERTIFICATE
REQUEST----- to the clipboard.
Using your favorite mail client software, create a new e-mail message
and paste the text from the clipboard. Send this message to the
Certification Authority that will create an SSL certificate in
accordance with the information you supplied.
When you receive your SSL certificate, save it on your local machine or network.

Return to the SSL Certificates repository (Home > SSL Certificates).
Return to the domain's administration screen (Home) and click the Web Hosting Settings icon in the Web Site menu.


Select the SSL certificate that you wish to install from the Certificate drop-down box.
Select the SSL support check box and click OK.

Your Certificate should work properly now.