Article ID: 297987 - View products that this article applies to.
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If the Active Directory Connector (ADC) Connection Agreement between Exchange Server 5.5 and Active Directory is one way, the Recipient Update Service may create duplicate SMTP addresses. When this happens, the changes in Active Directory are never replicated back to Exchange Server 5.5, and therefore, the two directories become unsynchronized, causing mail to generate non-delivery reports (NDR).
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/301378/EN-US/ )XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
There are two ways to avoid this problem:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 2.
Article ID: 297987 - Last Review: October 23, 2013 - Revision: 3.3