@liamcooper But is, for instance,
webcal://calendar.manutd.com/Manchester_United.icsreally referenced with
webcal://in the DAVx5 properties?
The url that shows in DAVx5 properties is similar to what I said in my previous post https://serverurl/remote.php/dav/calendars/username/calendarname, but this is probably just a proxy for the webcal link.
The Manchester_United.ics file is also available through http protocol and it works, so I’m running with that as a work around for now.