Got a problem with the scheduler when updating events via the drag and drop functionality which is replicable on the this demo - http://demos.telerik.com/kendo-ui/scheduler/move-resize
If you try move an event with multiple series and select "Do it for entire series". It will then remove all of the other events.
My problem is very similar, I have a scheduler with a list of attendees, an event can have multiple attendees but when dragging and dropping the scheduler only passes 1 attendee.
I'm not sure how to fix this problem so any help would be much appreciated.