letsEncrypt is an alternative AutoSSL provider for users who opt to not use the default AutoSSL Powered by cPanel provider. Installing the LetsEncrypt provider is a straightforward process that involves running one command.
Procedure
Installation of the officially supported AutoSSL – Let’s Encrypt provider can be completed by performing the following command via SSH as the root user:
/usr/local/cpanel/scripts/install_lets_encrypt_autossl_provider