Microsoft KB Archive/297356

= XADM: ADC Cannot Replicate MsexchmasteraccountSID and Generates Event ID 8281 =

Article ID: 297356

Article Last Modified on 2/28/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q297356



SYMPTOMS
During Active Directory Connector (ADC) replication, the following warning may be logged 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=Brad H1,CN=Users,DC=NT4DOM1,DC=RCPDOM,DC=extest,DC=microsoft,DC=com

because this sid is already on the object

CN=t-bradh1,CN=Users,DC=NT4DOM1,DC=RCPDOM,DC=extest,DC=microsoft,DC=com. (Connection Agreement 'CDC-SITE1' #1444)



CAUSE
This behavior may occur if all of the following conditions are true:
 * The end point of the ADC Connection Agreement is not a global catalog server.

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 * The mailbox that you are replicating already has an existing Active Directory account.

-and-
 * The mailbox's display name is different from the Active Directory account name.

The ADC renames the user object on the domain controller to the Microsoft Exchange Server 5.5 display name. However, when the uniqueness check for the master account SID is performed against the global catalog server, the name change has not been replicated to the global catalog server. An object with a different distinguished name is found with the same master account security identifier (SID), and therefore the warning is logged.



RESOLUTION
You can safely ignore this warning while you make sure that the two objects listed in the warning are the same object.



WORKAROUND
To work around this issue, modify the ADC Connection Agreement to point to the global catalog server.



MORE INFORMATION
For additional information about a similar issue, click the article number below to view the article in the Microsoft Knowledge Base:

309243 XADM: NTDSnoMatch Causes Active Directory Connector Event 8281 with Duplicate Security ID

Additional query words: 8281,CA,ADC,msExchMasterAccountSid exch2kp2w

Keywords: kberrmsg kbprb KB297356

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