Plesk-Let’s Encrypt SSL
Overview - Let's Encrypt
Let's Encrypt is a free, automated Certificate Authority (CA) which allows the rapid installation of SSL certificates. The latest Plesk Lets Encrypt extension provides this as an easy option for you to use.
Install - Let's Encrypt SSL
Step - 1 Log into your hosting Control Panel.
Step - 2 Click on the Website & Domains tab.
Step - 3 Click on Let's Encrypt.
Step - 4 Select the check box Include www as an alternative domain name , even if you don't use www. as a prefix for you site. This is to ensure all redirects are also secure.
Step - 5 Click Ok to save and the Let's Encrypt SSL will be generated and installed under your hosting in Plesk.
Step - 6 Next we need to Select the Let's Encrypt SSL generated and force a redirect from HTTP to HTTPS as the webserver by default will load your website on HTTP.
Step - 7 Click on Hosting Settings:
Step - 8 Under the Security section the below need to be selected.
Permanent redirect from HTTP to HTTPS
Let's Encrypt Certificate
Step - 9 Click Ok to save and then check / confirm your Website is now loading on HTTPS and no SSL warnings.