Hello,
I've installed El Capitan beta 6 and Server 5.0 beta 4. I've configured the hostname and domain and installed an SSL certificate for the domain. However, under certificates, I cannot use the certificate for Open Directory and Calendar service doesn't even appear in the list of services for custom configuration.
I've tried reinstalling the server package over the current configuration.
I've checked on the command line and the calendar service has nothing configured for SSL.
I'm not sure if this is a bug of the server beta or a configuration error.