XCLN: Meeting Request Generates Non-Delivery Report for a Recipient Not Invited to Meeting

When you send a meeting request, you may receive a non-delivery report (NDR) for a recipient who was not invited to the meeting that is similar to the following:

This problem can occur if the recipient of the meeting request has a damaged delegate rule or is using a delegate rule that points to a mailbox that has been deleted. For additional information about NDRs from attendees not listed in an appointment, click the article number below to view the article in the Microsoft Knowledge Base:

To resolve this problem, remove the delegate permissions:

1. On the Tools menu, click Options.
2. Click the Delegates tab.
3. Click the entry for the user who is no longer in the global address list, and then click Remove.
4. Click OK.

When you set up delegate permissions, Outlook creates a hidden rule in the Inbox that automatically forwards meeting requests to the delegate. When the delegate mailbox is removed from the global address list, the delegate rule is not automatically updated.