I'm experiencing the following issue using Exchange calendar on my iPhone/iPad on iOS 10... 1. Create a recurring event and invite others to the event. 2. From iOS device, edit the date or time of a single instance of the recurring event. Expected: The people you invited to the event should receive updated invitations and your calendar on other devices should be updated. Actual result: The people you invited to the event do not receive updated invitations, and the event change does not sync to other devices. Is anyone else experiencing this issue? Does anyone know of any solution or workaround?