Usecase:
john:
* has write priveleges to janes calendar
* has her calendar enabled by default
ida:
* creates a recurring event that have both (john and jane) as attendee
* adds an exception
jane:
* accepts the exception
john:
* decline the exception
jane/john:
* checks her calender to the see the correct status for both
Does not work, because we have no logic to deside what incidence john will update via the itiphandler (kdepimlibs/akonadi/calendar/schadular_p.cpp). The logic so far: only check if, we have write perssisions to the incidence and have the correct exception to touch and it updates only one. So randomly either jane or johns calendar will be updated with the decline of john. And because this is done via **status=canceled** we will hit T471 as well. Btw. updating janes calendar event with **status=canceled** would mark jane as declined and not john.