Receiving unwanted meeting related information in Outlook Inbox

Description
A user complains that he is receiving unwanted meeting related information in his Inbox. You examine the meeting details and found out that it doesn’t contain the user email address in the required, optional, or resources field. The meeting invitations were addresses to other email address.
Resolution
Most likely that one of the mailbox in the required, optional, or resources field of a meeting invitation has delegation setting to that user. On each mailbox, check the Delegate setting on Microsoft Outlook.
On Outlook, click Tools > Options > Delegates. See whether delegates are setup. Check on the permission details. Clear the ‘Delegates receive meeting related information send to me’.