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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

5 Responses to “Two recipients are configured with the same e-mail address”

  1. Ben L Says:

    OMG… this solution was soo cool… Thanks a ton… Do you know what caused it? Never mind, you are the best. 🙂

  2. Chris Says:

    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

  3. Suraj Says:

    Thanks a ton for the solution!!

  4. Harry Says:

    Never would have found the solution without your hint. Many Thanks! You are really the MSExchangeGuru 🙂

  5. Exchange error, “Two recipients are configured with the same e-mail address. “ | Nick's IT Crap Says:

    […] http://msexchangeguru.com/2010/07/19/two-recipients-same-emailid/ […]

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