Calendar invitations generate NDR for linked mailbox - invitation is delivered - message tracking shows two copies of invitation
Hi All,I have a problem at the moment whereby meeting invitations sent to some linked mailboxes generate a NDR. The invitation is delivered to the mailbox, and when I check the message tracking logs I see two copies of the invitation hitting the HT server, one of which is delivered and the other fails with an NDR.The problem can be reproduced through OWA so is not caused by tags or offline address books. We are running EX2007SP1 RU9.The message tracking logs are showing the SMTP address of the recipient as the delivered mail, but an X500 address as the delivery failure. I have no idea where it is picking this up from.The NDR is as follows : Delivery has failed to these recipients or distribution lists: Test User 1The 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. Test User 2The 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. Test User 3The 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. Test User 4The 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: Server.domain.com IMCEAEX-_O=stuff#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## IMCEAEX-_O=stuff#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## IMCEAEX-_O=stuff#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## IMCEAEX-_O=stuff#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## Original message headers: Received: from server.domain by server.domain with mapi; Fri, 19 Feb 2010 12:03:16 +1100 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: MeTo: Test User 1 <IMCEAEX-_O=Stuff>, Test User 2 <IMCEAEX-_O=Stuff>, Test User 3 <IMCEAEX-_O=Stuff>, Test User 4 <IMCEAEX-_O=Stuff>,Date: Fri, 19 Feb 2010 12:03:14 +1100 Subject: Test Appointment - Please ignore and delete Thread-Topic: Test Appointment - Please ignore and delete Thread-Index: Acqw/0/etofY0svwTVa6ke6rDGnHoA== Message-ID: <C3ED27C6AF3EB14F851128CFE7EB83F314071A4B05@GHASSC-EV1.GHASSC.LOCAL> Accept-Language: en-US, en-AU Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: <C3ED27C6AF3EB14F851128CFE7EB83F314071A4B05@GHASSC-EV1.GHASSC.LOCAL> acceptlanguage: en-US, en-AU MIME-Version: 1.0 Any help very gratefully acceptedThanks
February 19th, 2010 8:12am

Hi Sattman, If you send a test email(not meeting request) to these recipients, does the issue occur? If you send the meeting request to one linked mailbox user, can you reproduce the issue? How about if you send the metting request to one common user(not linked mailbox user)? Is there any clues in event log? I await your reply. Thanks, Elvis
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February 23rd, 2010 6:05am

Hi Elvis,Many thanks for replying, I was starting to think that this may drop out of sight.In answer to your questions :- A test mail to the recipients is delivered correctly, only a single copy of the message is generated- A test meeting request to one individual is delivered correctly, only a single copy of the mail is generated- Meeting requests to other users are working fineIt seems that the meeting requests are being delivered fine to inidividuals, but when sent to multiple linked mailboxes the issue occursEDIT : I've just tried sending to a separate group of linked mailboxes and there is something very, very wrong here. The NDRs are coming from addresses different to the invited recipients i.e. I'm have sent a meeting invite to user 1, user 2 and user 3. I am receiving an NDR from user4, user 5, user 6 and user 7. The message is delivered to 1, 2 and 3.???
February 24th, 2010 3:55am

I actually have this exact same problem... Did you ever happen to get it resolved?In my case... if anyone in the company sends a meeting request to User1, it goes to User3 too. It works fine for User1 and all of that, but User2 (who sent the request) gets an NDR back about User3... who wasn't included in the meeting request. Very confusing... User3 no longer works for the company and their email and account were deleted.. so I'm guessing it's related to a missing account somewhere.For testing purposes.. I recreated User3's email/account (although I figured the SID would be different so it wouldn't matter) and sure enough, even with a valid user3 account in there... you still get a NDR.It has to be something in the server somewhere.. but I'm at wits end... Did you get it resolved or have any updates?Thanks,Izac
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March 17th, 2010 5:53pm

Hi all, Check the Delegates tab in the Options window in the receiving user's Outlook (not the NDR users).2003 & 2007 - (Open Outlook, Tools Menu, Options, Delegates Tab)2010 - (Open Outlook, File Menu, Info, Account Settings Button, Delegate Access)Sattman - Users 4, 5, 6 and 7 may be delegates of users 1, 2 and 3.Cowfrop - User3 may be a delegate of User1NDR's will come back if the delegates have since left and the entry was not removed, as they will be CC:'d into the calendar invitations. Cheers, Richard
April 7th, 2010 3:41am

As Richard says it sounds like a hidden/missing delegate. See this KB for more details. http://support.microsoft.com/kb/253557/en-us Neill
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April 8th, 2010 4:48pm

Hi guys, We are experiencing the same issue with our client and it looks like it started with out migration to exchange 2007 (or probably not related at all). We are fixing these on a case by case basis and this is the way we are doing it at the moment. Login to Outlook under the user (as the user or give yourself full access to the mailbox), make sure you create a separate profile as the user if you are using the full access option. Go to the (Rules and alerts) - Make a backup. Close Outlook Re open Outlook using the cleanrule switch (Outlook /cleanrules). Import the rules back - do another test and everything should be good now. My question is: is there a way to find all the users with these ghost delegates?? Karim
June 17th, 2010 7:40am

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