I have now testing DAVdroid 0.8.3 against Kolab (kolabnow.com) again, and I am generally happy:
When I delete an instance of a recurring event series on the phone, the instance stays visible in the Kolab web interface, but becomes striked through and gets the annotation “cancelled”, with the option to fully delete it on the kolab server.I’d have expected the instance to be fully deleted automatically, but I can live with the situation. When I delete an instance of a recurring event series in the Kolab web interface or mark it as cancelled, the instance is deleted on the phone.
This is also fine for me. I assume the status “cancelled” cannot be represented on the phone.
So: Thank you! 👍