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The Bandwidth Policy Server is not able to authenticate with peer servers. Check the event log for the recommended resolution.

Microsoft.LS.2015.Monitoring.UnitMonitor.TimerResetEvent.PDP.PDP_MACHINE_DISCONNECTED_STALE_CREDS (UnitMonitor)

Knowledge Base article:

Summary

Authentication failed during an attempt to connect to server.

Causes

There was a certificate mismatch between the two servers.

Resolutions

Verify the certificates in both the servers.

Element properties:

TargetMicrosoft.LS.2015.Component.PDP
Parent MonitorSystem.Health.ConfigurationState
CategoryConfigurationHealth
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.LS.2015.MonitorType.TimerResetEvent.Repeated
RemotableTrue
AccessibilityPublic
Alert Message
[Skype] Authentication failed during an attempt to connect to server.
{0}

Please see the 'Product Knowledge' and the 'Alert Context' tab on Alert Properties view for more information.
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.LS.2015.Monitoring.UnitMonitor.TimerResetEvent.PDP.PDP_MACHINE_DISCONNECTED_STALE_CREDS" Accessibility="Public" Enabled="true" Target="Microsoft.LS.2015.Component.PDP" ParentMonitorID="Health!System.Health.ConfigurationState" Remotable="true" Priority="Normal" TypeID="Microsoft.LS.2015.MonitorType.TimerResetEvent.Repeated" ConfirmDelivery="true">

  <Category>ConfigurationHealth</Category>

  <AlertSettings AlertMessage="Alert_Authentication_failed_during_an_attempt_to_connect_to_server.">

    <AlertOnState>Error</AlertOnState>

    <AutoResolve>true</AutoResolve>

    <AlertPriority>Normal</AlertPriority>

    <AlertSeverity>Error</AlertSeverity>

    <AlertParameters>

      <AlertParameter1>$Data/Context/Context/DataItem/EventDescription$</AlertParameter1>

    </AlertParameters>

  </AlertSettings>

  <OperationalStates>

    <OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.TimerResetEvent.PDP.PDP_MACHINE_DISCONNECTED_STALE_CREDS.Timer" MonitorTypeStateID="TimerEventRaised" HealthState="Success"/>

    <OperationalState ID="Microsoft.LS.2015.Monitoring.UnitMonitor.TimerResetEvent.PDP.PDP_MACHINE_DISCONNECTED_STALE_CREDS.Repeated" MonitorTypeStateID="RepeatedEventRaised" HealthState="Error"/>

  </OperationalStates>

  <Configuration>

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

    <LogName>Lync Server</LogName>

    <ErrorExpression>

      <And>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="UnsignedInteger">36024</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

        <Expression>

          <SimpleExpression>

            <ValueExpression>

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

            </ValueExpression>

            <Operator>Equal</Operator>

            <ValueExpression>

              <Value Type="String">LS Bandwidth Policy Service (Core)</Value>

            </ValueExpression>

          </SimpleExpression>

        </Expression>

      </And>

    </ErrorExpression>

    <AutoResolveInterval>25200</AutoResolveInterval>

    <TimerWindowInSeconds>3600</TimerWindowInSeconds>

    <RepeatCount>25</RepeatCount>

  </Configuration>

</UnitMonitor>