I've got a strange case where one of our users has created a recurring event for a group of people, but now it doesn't appear in her own calendar.. so she can't edit or remove the event. The event in the other users calendars shows that she is the organiser, but no one can make changes to them.

Is there any way I can find out what happened to that entry, or will I have to go through every users calendar and delete the appointments manually?