Admin (root) access to Kerio Connect server
Kerio Connect was picking the self-signed certificate instead of the valid SSL.
Navigate to the Kerio Connect installation folder. Defaults are:
Rename sslcert folder to
Create a new folder and name it
Copy the valid certificate and key from sslcert.OLD, as shown in the image below, and move it to the sslcert folder.
SSL certificate is now showing as valid.