Two recipients are configured with the same e-mail address
This often happens where we get NDR 5.1.4 stating “Two recipients are configured with the same e-mail address” in Exchange.
From: System Administrator
Sent: Wednesday, February 21, 2010 4:22 AM
To: UserA
Subject: Undeliverable: Delivery Status Notification (Failure)
Your message did not reach some or all of the intended recipients.
Subject:
Sent: 2/21/2010 4:22 AM
The following recipient(s) could not be reached:
Lastname, Firstname on 2/21/2010 4:22 AM
A configuration error in the recipient’s e-mail system prevented delivery of this message. Two recipients are configured with the same e-mail address. Contact your administrator.
<MSExch.MSExchangeGuru.com #5.1.4>”.
Cause:
The LegacyExchangeDN of the user is not pointing to the correct user ID/NT ID.
How to resolve:
Open ADSIEdit.msc, Expand Domain Partition and navigate to the path where the user resides.
Goto the properties of the user and look for the attribute “legacyExchangeDN”.
Open it and see if the user’s NT ID is displayed at the end.
Edit and change it and wait for replication.
Ratish
December 20th, 2010 at 2:00 am
OMG… this solution was soo cool… Thanks a ton… Do you know what caused it? Never mind, you are the best. 🙂
August 23rd, 2011 at 8:23 pm
I am new to exchange and had no idea what to do when I got this error. Search engine showed me your website which had precise details on how to resolve this. To thank you is the least I can do. Thank you for all your hardwork expecting nothing in return. Good job.
Chris C
November 6th, 2012 at 3:12 am
Thanks a ton for the solution!!
March 7th, 2013 at 5:18 am
Never would have found the solution without your hint. Many Thanks! You are really the MSExchangeGuru 🙂
April 11th, 2014 at 12:57 pm
[…] https://msexchangeguru.com/2010/07/19/two-recipients-same-emailid/ […]