We have two users who are on Macs using Outlook 2011.

User Two was set as an editor for the calendar of the User One, but not as a delegate.

Now the User Two is receiving all meeting invites for User One even after removing the editor rights.

User One is also no longer able to set another user as a delegate. It gives an error each time.

How do I prevent User Two from receiving the invites for User One?