While trying to build a Kerberos ticket, the Key Distribution Center (KDC) detected two user objects with the same user principal name (UPN). The KDC cannot determine which user object is correct; therefore, it cannot create a ticket.
The Users and Computers Microsoft Management Console (MMC) snap-in checks for this problem and attempts to prevent it from occurring. However, the following situations can create this condition:
A script that is being used to create users is not checking for uniqueness.
A Microsoft® Windows® NT 4.0 utility is being used to create users.
A metadirectory or other provisioning tool that is being used to create users is not checking for uniqueness.
Replication is slow or malfunctioning.
A denial-of-service attack is under way.
Change the UPN on one of the conflicted user objects using the Users and Computers snap-in.
For more information, see:
Target | Microsoft.Windows.Server.2003.AD.DomainControllerRole | ||
Category | EventCollection | ||
Enabled | True | ||
Event_ID | 11 | ||
Event Source | KDC | ||
Alert Generate | True | ||
Alert Severity | Error | ||
Alert Priority | Normal | ||
Remotable | True | ||
Alert Message |
| ||
Event Log | System | ||
Comment | Mom2005ID='{82145074-FBAC-4362-AE62-C3BE4B0C9125}';MOM2005GroupID= |
ID | Module Type | TypeId | RunAs |
---|---|---|---|
DS | DataSource | Microsoft.Windows.EventProvider | Default |
CollectEventData | WriteAction | Microsoft.SystemCenter.CollectEvent | Default |
CollectEventDataWarehouse | WriteAction | Microsoft.SystemCenter.DataWarehouse.PublishEventData | Default |
GenerateAlert | WriteAction | System.Health.GenerateAlert | Default |
<Rule ID="Duplicate_User_Principal_Names_have_been_detected_5_Rule" Comment="Mom2005ID='{82145074-FBAC-4362-AE62-C3BE4B0C9125}';MOM2005GroupID=" Enabled="onEssentialMonitoring" Target="AD2003Core!Microsoft.Windows.Server.2003.AD.DomainControllerRole" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">
<Category>EventCollection</Category>
<DataSources>
<DataSource ID="DS" TypeID="Windows!Microsoft.Windows.EventProvider">
<ComputerName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>
<LogName>System</LogName>
<Expression>
<And>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery>EventDisplayNumber</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value>11</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<SimpleExpression>
<ValueExpression>
<XPathQuery>PublisherName</XPathQuery>
</ValueExpression>
<Operator>Equal</Operator>
<ValueExpression>
<Value>KDC</Value>
</ValueExpression>
</SimpleExpression>
</Expression>
<Expression>
<RegExExpression>
<ValueExpression>
<XPathQuery>EventData/Params/Param[2]</XPathQuery>
</ValueExpression>
<Operator>MatchesMOM2005RegularExpression</Operator>
<Pattern>(8)|(DS_USER_PRINCIPAL_NAME)</Pattern>
</RegExExpression>
</Expression>
</And>
</Expression>
</DataSource>
</DataSources>
<WriteActions>
<WriteAction ID="GenerateAlert" TypeID="SystemHealth!System.Health.GenerateAlert">
<Priority>1</Priority>
<Severity>2</Severity>
<AlertOwner>$Data/PublisherName$</AlertOwner>
<AlertMessageId>$MPElement[Name="Duplicate_User_Principal_Names_have_been_detected_5_Rule.AlertMessage"]$</AlertMessageId>
<AlertParameters>
<AlertParameter1>$Data/EventDescription$</AlertParameter1>
</AlertParameters>
<Suppression>
<SuppressionValue/>
</Suppression>
</WriteAction>
<WriteAction ID="CollectEventData" TypeID="SC!Microsoft.SystemCenter.CollectEvent"/>
<WriteAction ID="CollectEventDataWarehouse" TypeID="SCDW!Microsoft.SystemCenter.DataWarehouse.PublishEventData"/>
</WriteActions>
</Rule>