I have an account with wint.global. They have cPanel 56.0.28 and Horde 5.2.6 , which together offer CalDAV and CardDAv syncing. It works fine, as long as you use the full URL:
And then username (firstname.lastname@example.org) and the password.
But the short URL does not work:
This is frustrating, because I set up the subdomains for autoconfig (_caldavs._tcp, etc.). But those can only be set for a domain and a port, not a folder. Thus they currently don’t work. If that was to work, I could setup accounts simply using email and password.
Please note that this might be a bug in cPanel version 56.0.28 or Horde, since I wasn’t able to test this with other clients as of yet.
I am willing to share logfiles of failed attempts or even setup a test account, if someone wants to fix it, but those logfiles contain a lot of personal information.
If needed, I can also purge all the personal information from the logfile and upload it here, though maybe the information I provided above is sufficient?