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?