This article was previously published under Q309239
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In a mixed-mode (Microsoft Exchange Server 5.5 and Exchange 2000) environment, if a mailbox or other non-container object (such as a distribution list) exists in Exchange Server 5.5, and you create a container (such as an organizational unit) in Active Directory with the same name as the mailbox or other non-container object in Exchange Server 5.5, the Active Directory Connector (ADC) may not be able to process naming collisions between containers and non-containers; objects under collided containers may not replicate.
The mailbox or distribution list in Exchange Server 5.5 that has the same name as the organizational unit in Active Directory may not replicate to Active Directory.
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 theMicrosoft Knowledge Base:
301378 XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.
This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 2.