Outlook Meeting request generates NDR

When you send a meeting request to another user on Exchange, you may receive

Your message did not reach some or all of the intended recipients.
Subject: Test Meeting
Sent: 7/29/2004 2:23 PM

The following recipient(s) could not be reached:
John Smith on 7/29/2004 2:23 PM
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<server.domain.com #5.1.1>


I found this to be caused by a user account having a Delegate assigned, and the delegate was deleted, then the mailbox was moved to another (higher version) of Exchange.

I cleared this up by opening up the mailbox of the user using Outlook, then checking TOOLS/OPTIONS/DELEGATES.

This is what it SHOULD look like:

In my case, there was a tiny greyed out checkbox in the box.  This clued me in that there WAS a delegate at some point in the past.  I then ADDED a new user, then CLEARED the checkbox, then REMOVED the user.

Problem solved!

If you have a better solution, I'd be interested to hear what it was - this plagued me for 6 months - thankfully the user(s) in question didn't do a lot of meeting scheduling.


Credit to this document for putting me on the right track: http://support.microsoft.com/?kbid=251168

If you found this document useful, please let me know - drop me a quick email.

Last updated 01/19/2005