This article was previously published under Q309243
This article has been archived. It is offered "as is" and will no longer be updated.
While you are importing an object that has NTDSnoMatch stamped on an extension attribute, the Active Directory Connector (ADC) reports an event 8281 warning in the Application event log:
Event Type: Warning Event Source: MSADC Event Category: Replication Event ID: 8281 Description: ADC could not replicate the msExchMasterAccountSid to CN=user,OU=MyOu,DC=Domain,DC=com because this sid is already on the object CN=OtherUser,OU=MyOu,DC=Domain,DC=com. (Connection Agreement '1 Way From 55' #3272)
This behavior occurs because the associated Microsoft Windows NT account on this object is already the Master Account Security ID (SID) on an object in the target 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.