Exchange 2007: Messages are being sent to a deleted user.

One of our staff left (a P.A. with access rights to the M.D.'s mail) and has had their domain account and mailbox removed. The problem is that when anybody sends a meeting invite (E-Mails to the MD don't return an NDR) to the MD, the ex member of staff gets copied in and the sender gets a failure as they no longer have an account.  The MD still gets their meeting invite, but it's just a bit annoying.

Just to clarify, we have a room mailbox, so the organiser sends the invite to the board room and MD and gets an NDR from the ex member of staff.  After I deleted the users mailbox, I have setup their E-Mail address in the MD's aliases, so it's still valid on the Domain.

I have checked the Delivery Options, Forwarding (MD is NOT forwarding to anybody), Send As and Manage Full Access permissions and the ex member of staff does not appear in there, so why is the system trying to notify them still?

Here's a failure report:

Delivery has failed to these recipients or distribution lists:

Ex Staff Members Name

The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator.

Sent by Microsoft Exchange Server 2007

Diagnostic information for administrators:

Generating server: ourserver.our.domain.com

IMCEAEX-_O=FIRST+20ORGANIZATION_OU=First+20administrative+20group_cn=Recipients_cn=exstaffaddress.com
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

Original message headers:

Received: from ourserver.our.domain.com ([fe80::8dfa:4dc8:36a1:6809]) by
ourserver[Internal IP]) with mapi; Fri, 8 Apr 2011 16:50:33 +0100
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: Anotherstaffmember<Anotherstaffmember@our-domain.com>
To: Ex staff member
      <IMCEAEX-_O=FIRST+20ORGANIZATION_OU=First+20administrative+20group_cn=Recipients_cn=exstaffaddress.com>
Date: Fri, 8 Apr 2011 16:50:33 +0100
Subject: Accepted: Meeting Request
Thread-Topic: Meeting Request
Thread-Index: Acv2BJcZv5CalacwRaeBmr+Vs5wkDgAABaKQ
Message-ID: <96B01F7459E83B46A50358B4EA02D200C517C6C@mailserver>
Accept-Language: en-US, en-GB
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator: <96B01F7459E83B46A5035874EA02D200C517C6C@mailserver>
acceptlanguage: en-US, en-GB
MIME-Version: 1.0

Thanks in advance guys.
LVL 3
-Juddy-Asked:
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mass2612Commented:
Hi,

A very common problem that causes an NDR when a meeting request is sent is due to someone having set the deleted user up as a delegate that had the option set to forward meeting requests to my delegate option.

If the user has left you need to clean up the delegate rule. Check the delegates for User1. This error is normally caused by duplicates being set to recieve meeting requests via Outlook > Tools > Options > Delegates.

The other thing I've read before that may work for you is to remove any delegates from the account. Restart outlook. Add a new delegate that was never a delegate before. Restart Outlook. Remove the newly assigned delegate again and restart Outlook. This might reset the delegate process and clear it up.

When you set up delegates a hidden rule in the Inbox that automatically forwards meeting requests to the delegate. If this gets corrupted you can use MFCMapi to clean them up - http://support.microsoft.com/kb/924297.
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-Juddy-Author Commented:
I'll give that a try.
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Firmin FrederickSenior IT ConsultantCommented:
nice answer mass2612 hadn't thought of delegates
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-Juddy-Author Commented:
Is the Delegates option only available from the users local Outlook as they are out of the office! I checked mine and there are no entires.
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LingerLongerCommented:
This delegate would be setup on the MD's mailbox, granting the PA access.
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-Juddy-Author Commented:
And this is only viewable from the local Outlook installation and not from the Exchange Console, correct?
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mass2612Commented:
Yeah you can't see if via the EMC. You would need to logon to the mailbox with permissions via Outlook to see it.
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-Juddy-Author Commented:
The user in question is in today, so I'll try and post results.
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-Juddy-Author Commented:
Thanks to all.
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