Calendar Issue when a delegate is used in an Outlook environment

A problem we are seeing: if a delegate accepts a calendar invitation for their manager, the calendar item is not updated as "accepted" on the manager's iOS device. This occurs on iPhones and iPads in general.

When the delegate accepts the invitation, the Microsoft Exchange server is updated as appropriate. But the Apple Device does not see the change.

Interestingly enough, if the delegate declines the meeting, the event is deleted from the calendar as expected.