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Exchange NDR error: 550 5.1.1

I had a public folder that I deleted yesterday, I first disabled the email address on it,  and then deleted the folder.
I then created a mailbox, with the same email address.

Now when I try to email the new account, I get these errors.  Is there a manual way to update exchange, or what would I need to do to refresh exchange, or remove any of the old pointers to the public folder?

Delivery has failed to these recipients or groups:
The email address you entered couldn't be found. Please check the recipient's email address and try to resend the message.
If the problem continues, please contact your helpdesk.

Diagnostic information for administrators:
Generating server: ELIJAH.mydomain.org
Remote Server returned '550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found'
Original message headers:
Received: from ELIJAH.mydomain.org ( by
 elijah.mydomain.org ( with Microsoft SMTP Server (TLS) id
 15.0.1156.6; Tue, 14 Nov 2017 08:40:30 -0800
Received: from ELIJAH.mydomain.org ([fe80::97d:771a:ed09:476]) by
 elijah.mydomain.org ([fe80::97d:771a:ed09:476%12]) with mapi id
 15.00.1156.000; Tue, 14 Nov 2017 08:40:30 -0800
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: Dan Andries <dan@mydomain.org>
To: DonorRelations <DonorRelations@mydomain.org>
Subject: test
Thread-Topic: test
Thread-Index: AdNdZ0fAM8YWEoyAT0qN9JJQH0yK6A==
Date: Tue, 14 Nov 2017 08:40:30 -0800
Message-ID: <f9216d42b63c45139641aea2037ce0bb@elijah.mydomain.org>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: <f9216d42b63c45139641aea2037ce0bb@elijah.mydomain.org>
MIME-Version: 1.0
X-MS-Exchange-Transport-FromEntityHeader: Hosted
X-Originating-IP: []
Return-Path: dan@mydomain.org
ExchangeWindows Server 2012Active Directory

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Last Comment

8/22/2022 - Mon
Hemil Aquino

This issue may occur if the on-premises mail-enabled user who represents the moved mailbox isn't stamped correctly with the target address. The Exchange server generates an NDR message because the on-premises Active Directory Domain Services (AD DS) can't locate the user in order to route the mail correctly.

1- Open the Exchange Management Console on your local Exchange 2010 server.
2- Click Microsoft Exchange On-Premises, and then click Recipients Configuration.
3- Right-click the user, and then click Properties.
4- On the E-mail Addresses tab, click Add, click SMTP Address, and then enter the email address. Use the alias@domain .mail.onmicrosoft.com format for the email address.
5- Select the name that you entered, and then click Set as Routing Address.
6- Click OK.

I actually have exchange 2013, but no worries, I forgot to mention that. So I did what you said, I believe you wanted to make sure I have checked the checkmark where it updates the emailaddress based on the email policy in place.  

But it's still not working, I keep on getting the bounce back.

Hemil Aquino

Oh ok, but I need to ask you something before move further into this.
Did you delete the cache of that email in your computer? meaning when you type the email address in outlook then the auto complete list appear, you need to deleted, close outlook and re-enter that user.

Try that and see how it goes.
Your help has saved me hundreds of hours of internet surfing.

yes, I did delete the outlook autocomplete cache.
Hemil Aquino

Did you try using a different machine to send a test email to that specific address. Please do that, because you hint it's just right here

I had a public folder that I deleted yesterday, I first disabled the email address on it,  and then deleted the folder.
I then created a mailbox, with the same email address

That happened to me and it turned out that my machine was holding the cache of my email somehow.

yes, I just did a test from a laptop, and I'm getting the same problem.
It's not a problem with my local machine, the problem is with my AD.
My AD is still pointing to the old public folder.
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Hemil Aquino

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so I know for sure it's not #1 or #2 from your list.  It's either #3 or #4, I know for sure.

So yesterday, the email donorrelations@mydomain.org was a public folder and it was working fine, multiple people internally and externally was able to send emails to it.  The department supervisor did not want a public folder, but wanted that to be a mailbox, so email can be in the mailbox and also be forwarded on to someone else as well.

So I disabled the mail-enabled public folder called donorrelations (which had that email address), and then then deleted the folder.  Then I created a mailbox called donorrelations@mydomain.org
When I did some tests last night, it seemed to work,

I just did an external test and that works, so I can send an email from my gmail.com account to donorrelations@mydomain.org
But all my internal emails are failing.  This is strange.
Hemil Aquino

I've found this. I never tried but you might give a shot

Went to the properties of the user.
Navigated to the e-mail address tab.
“Add” a new “Custom Address”
Filled in “type” as “X500″ and edited the massager address from outlook as per below and entred it as the address
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Hemil Aquino

That's good man. Keep a log of that.
I started with Experts Exchange in 2004 and it's been a mainstay of my professional computing life since. It helped me launch a career as a programmer / Oracle data analyst
William Peck

yes, thank you sir... I use onenote, and I added it to my one note !

Thanks Hemil for your help.