Specify Certificates for Server Services
If you click the following button on the SSL/TLS certificate overview, you will be taken to the SSL/TLS configuration for server services.
Here you can specify which certificate is used to secure KeyHelp, the email server, the FTP server and webmail.
A selection screen opens. Now select the desired certificate for the corresponding service.
In addition to self-signed or uploaded certificates, the services (except for webmail) can also be secured by a Let's Encrypt certificate, which is issued to the server domain.
For the Let's Encrypt certificate to work correctly, the server domain must resolve to the server IP.
Once you have set the desired settings, click the following button to apply them. The implementation of the setting can then take up to one minute.