I made a calendar on my own domain using webmail.owndomain.ext/
In Lighting i made a link to these calendar using CalDAV.
If i start Lighting the site responds with:
Website say Horde DAV-server and ask for user-name and password.
No connection can be made.
Using the same user-name and password to login in web-mail every thinks is fine.
What can be the reason i can not synchronize my calenders?