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Knowledge Base

Event ID: 5511 - Mismatched SIDs

Article ID: 169145

Article Last Modified on 11/1/2006

APPLIES TO

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

This article was previously published under Q169145

SYMPTOMS

Domain synchronization may fail with the following error:

Source: NETLOGON
Event ID: 5511
The servers <DOMAINCONTROLLER1> and <DOMAINCONTROLLER2> both claim to be an NT Domain Controller for the <DOMAIN> 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

Microsoft KB Archive/169145

Contents

Event ID: 5511 - Mismatched SIDs

SYMPTOMS

CAUSE

RESOLUTION