Meeting is automatically accepted when a delegate is added as an attendee
Original KB number: 3209427
Consider the following scenario:
- A user has one or more delegates assigned to their mailbox.
- The delegates create new meeting requests, and include themselves as attendees.
In this scenario, the meeting is automatically added to each delegate's calendar as accepted, and an "accepted" response is sent.
This behavior is by design in Microsoft Exchange Server and Exchange Online. When delegates add themselves to a meeting, Exchange considers this as a confirmation that the delegates want to attend. Therefore, Exchange automatically accepts the meeting on behalf of the delegates.