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Account Does Not Exist Error When Appointment Sent to Another User

One of the most common questions on forums is why does a user get a NDR (Non Delivery Report) report similar to the one below when they send an appointment to another person. The NDR will reference a user who is no longer part of the company and does not have an account on the system any longer.

Your message did not reach some or all of the intended recipients.
Subject: Sales Meeting
Sent: 8/22/2008 8:54 AM

The following recipient(s) could not be reached:
Another User on 8/22/2008 8:54 AM
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.
< #5.1.1>

This is caused by delegates.
The user referenced in the NDR was a delegate on the recipient of the appointment.

However what you may find is that when you look at Delegates through Outlook, the user is not listed.
This is because the delegate system can get "stuck" and the information in Outlook and on the server are not in synchronisation.

To reset it, simply follow the procedure below.

  1. Remove any delegates that are currently listed for the user.
  2. Add a new delegate to the list. IMPORTANT - this new delegate must not have been a delegate to the user before. I will usually create a temporary mail enabled account for this process and then delete afterwards.
  3. Wait at least 30 minutes for this change to be propagated to the server correctly.
  4. Remove the new delegate from the list.
  5. Wait at least 30 minutes again.
  6. Add the preferred delegates back in to the list.

This works by replacing the complete list of delegates on the account.

If this still doesn't work then you will have to scan the domain using adsiedit.msc for references to the former user on the user's settings. I have only ever had to do that once, when Outlook wouldn't open the delegates tab. Otherwise the procedure outlined above has always worked for me.

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