Yes: if you have an existing external or third-party SSL certificate you can install this at 20i.
Your certificate provider will need to provide the following sections for us to be able to install the SSL certificate:
These details will need to be entered within the SSL/TLS section within a 20i hosting package: Manage Hosting -> [select package] -> SSL/TLS.
Please also note that SSL certificates can take up to 30 minutes to install on to the web server. If your A records are then pointing to the IP address of the hosting package then your site should show as secure.
These steps should help you provide helpful and effective support to your clients.
1) If your client has a third-party SSL it’s always best to request this in the appropiate format. i.e. the individual Certificate, Private Key and Intermediate Certificate sections. It’ll make installing the SSL at 20i much easier.