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.
Who is Participating?
cpearsonaConnect With a Mentor Author 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

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.
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