Problem with Caldav

Hello,

I added my Nextcloud account via Caldav on iOS and Mac OS.
On Windows, with Outlook, I use the CalDav Synchronizer plugin to get the Nextcloud calendar.

When I receive an invitation (via an external contact) to an event where my email appears, I have the event in my Outlook Calendar. I also see it in my Mac OS calendar. If I accept the invitation, from Mac OS or Nextcloud, the event is validated in the calendar as accepted. However, after a while, 1 or 2 hours, the event reverts to a mode as if it had not been accepted.

Is this normal?
What can I do about it?

Obviously it is not what you are expecting.

You could go through the webserver logs, not sure if this is easy and conclusive. Therefore, I’d try to receive an invitation, then only connect with Outlook or MacOS calendar, accept the invitation and wait the 1-2h to see if you spot an issue. Perhaps one of the sync mechanisms already show an issue.