we have set up a CalDAV server here with SOGo as backend and frontend (WEBUI). Which is working as expected.
But there are some errors which I cannot reproduce and the logging also gives no hint since there is no logging: 1) macOS 10.11 - latest release I can login to CalDAV, I can create entries (which are synced) and they show up in WEBUI. But events created in WEBUI are not synced.
2) Same credentials, same usage on iPhone iOS12 - I can't even log in to the calender.
Here the HTTP error in the log indicates a "Forbidden"...but as stated the credentials are correct - maybe iOS sends a authentication methode which is not installed on my server?
Dan
The answer to this question is very simple and seems intuitive: