Issue Summary

Hi guys
it's the second time that an event canceled from the users is not deleted on my CalDAV calendar.
Any clue?

Steps to Reproduce

1. Cancel an event on calendar
2. Check on your calendar connected
3. Event doesn't disappear

Any other relevant information. For example, why do you consider this a bug and what did you expect to happen instead?

Technical details

My calendar is on Sabredav in the company mail server. https://nethservice.nethesis.it/webtop-dav/server.php/calendars/alessio@.it/.....
It works very well with other tool like simplymeet