Microsoft KB Archive/169145

= Event ID: 5511 - Mismatched SIDs =

Article ID: 169145

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q169145



SYMPTOMS
Domain synchronization may fail with the following error:

Source: NETLOGON

Event ID: 5511

The servers  and  both claim to be an NT Domain Controller for the  domain. One of the servers should be removed from the domain because the servers have different security identifiers (SID).



CAUSE
The easiest way for this error to occur is to install a domain controller while either it or the other domain controller is disconnected from the network or off-line. This will create a domain with the same name but it will have a different security identifier (SID). As far as Windows NT domains, machine accounts, and trusts are concerned, you have created a new domain.



RESOLUTION
The problem domain controller must be re-installed when it can connect to the primary domain controller.

Additional query words: trust installed account sync logon replication synchronization

Keywords: kbprb KB169145

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