for resuming my tests....whatever the client (K9, evolution, thunderbird) when I create an event in the caldav calendar, invitations are not sent to the attendees and I did not see the event in the attendee's calendar.
But when I delete the event, notification of deletion are sent ....fun
I'm not sure where the problem is, probably in sogo but I don't know why
this problem doesn't exist when you use the web interface
@others can you reproduce