Deleted user bounce back emails


We have a user connected to the Exchange Server using Entourage 2004. Email is working fine. The issue is, when someone sends an invitation to a meeting to this user, they get a bounce back (see below) from a different user that was deleted from the server months ago.

From: Administrator
Sent: 06 November 2008 13:43
To: -
Subject: Delivery Status Notification (Failure)

Your message

  To:      [Deleted user]
  Subject: testing
  Sent:    Thu, 6 Nov 2008 13:42:41 -0000

did not reach the following recipient(s):

[deleted user] on Thu, 6 Nov 2008 13:42:41 -0000
    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.
    <domain.domain.local #5.1.1>

The deleted user used to be a delegate for the current user. I have checked the machine(s) and all delegates have been deleted now so this cannot be the case.

I have also recreated a new identity for the current user and redownloaded all email.

Other than that, I have no idea where this can be coming from.

Any help would be greatly appreciated.
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Does the intended recipients have Delegates set up in Outlook?  It could be that this feature is automatically forwarding meeting requests to the deleted account.
Sorry, re-examined your question and I see you've already checked that.
cpearsonaAuthor Commented:
What was done was the below. Looks like a corrupt rule in the inbox that is created when you use the "forward meeting requests to delegate" as we did for [Deleted User] in this case. As the rule corrupt, it did not delete when we removed [Deleted User] as a delegate.

- Follow point in this link
- Follow points in this link


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