AD FS Windows Service Failed to Start Because of a Non-unique Certificate

Microsoft.ActiveDirectoryFederationServices20.FederationServerBadConfigurationMultipleCertificatesMatchMonitor (UnitMonitor)

Knowledge Base article:

Summary

The AD FS Windows service failed to start because the certificate that is identified in the AD FS configuration database is not unique.

If the AD FS Windows service is started successfully, the monitor will change to a Green state and the original critical alert will be resolved automatically.

Causes

This condition can occur when the certificate is found in the specified store, but there is more than one certificate that matches the findValue.

Resolutions

If the certificate was identified by name, and there are multiple certificates of the same name, configure the certificate by using the certificate thumbprint. Locate the element that is specified in this event, and modify its findValue to use the thumbprint of the certificate instead.

Element properties:

Target

Microsoft.ActiveDirectoryFederationServices20.FederationServer

Parent Monitor

System.Health.AvailabilityState

Category

AvailabilityHealth

Enabled

True

Alert Generate

True

Alert Severity

Error

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

Microsoft.Windows.2SingleEventLog2StateMonitorType

Remotable

True

Accessibility

Public

Alert Message

AD FS Windows Service Failed to Start Because of a Non-unique Certificate

The certificate that was identified by the findValue '{0}' was not unique. The AD FS Windows Service failed to start. Check the Alert Context tab for event details.

RunAs

Default

Source Code:

<UnitMonitor ID="Microsoft.ActiveDirectoryFederationServices20.FederationServerBadConfigurationMultipleCertificatesMatchMonitor" Accessibility="Public" Enabled="true" Target="Microsoft.ActiveDirectoryFederationServices20.FederationServer" ParentMonitorID="Health!System.Health.AvailabilityState" Remotable="true" Priority="Normal" TypeID="Windows!Microsoft.Windows.2SingleEventLog2StateMonitorType" ConfirmDelivery="true">

  <Category>AvailabilityHealth</Category>

  <AlertSettings AlertMessage="Microsoft.ActiveDirectoryFederationServices20.FederationServerBadConfigurationMultipleCertificatesMatchMonitor_AlertMessageResourceID">

    <AlertOnState>Error</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Error</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Params/Param[2]$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="FirstEventRaised" MonitorTypeStateID="FirstEventRaised" HealthState="Error"/>

    <OperationalState ID="SecondEventRaised" MonitorTypeStateID="SecondEventRaised" HealthState="Success"/>

  </OperationalStates>

  <Configuration>

    <FirstComputerName>$Target/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</FirstComputerName>

    <FirstLogName>$Target/Property[Type="Microsoft.ActiveDirectoryFederationServices20.FederationServer"]/ADFSEventLog$</FirstLogName>

    <FirstExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">135</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <RegExExpression>

            <ValueExpression>

              <XPathQuery Type="String">PublisherName</XPathQuery>

            </ValueExpression>

            <Operator>MatchesMOM2005RegularExpression</Operator>

            <Pattern>(^AD FS$)|(^AD FS 2.0$)</Pattern>

          </RegExExpression>

        </Expression>

      </And>

    </FirstExpression>

    <SecondComputerName>$Target/Host/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</SecondComputerName>

    <SecondLogName>$Target/Property[Type="Microsoft.ActiveDirectoryFederationServices20.FederationServer"]/ADFSEventLog$</SecondLogName>

    <SecondExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

              <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">100</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <RegExExpression>

            <ValueExpression>

              <XPathQuery Type="String">PublisherName</XPathQuery>

            </ValueExpression>

            <Operator>MatchesMOM2005RegularExpression</Operator>

            <Pattern>(^AD FS$)|(^AD FS 2.0$)</Pattern>

          </RegExExpression>

        </Expression>

      </And>

    </SecondExpression>

  </Configuration>

</UnitMonitor>