Alert for event Id: 25089 ('MEDIATIONSERVER_MRAS_CANDIDATES_CANNOT_BE_RESOLVED')

Microsoft.LS.2010.Monitoring.Rule.InfoEvent.MediationServer_MEDIATIONSERVER_MRAS_CANDIDATES_CANNOT_BE_RESOLVED (Rule)

Knowledge Base article:

Summary

Mediation Server was able to contact the A/V Authentication Service. However, there were no valid relay candidates returned to Mediation Server. Calls may still work, but the Mediation Server will not be able to send calls through the A/V Authentication Service. This event is throttled after 5 consecutive attempts at getting the relay candidates.

Causes

The Relay Addresses may no longer be able to be DNS resolved from the Mediation Server machine. The A/V Authentication Service may not be configured correctly.

Resolutions

Verify the Mediation Server machine can resolve the Relay Addresses. Check if the A/V Authentication Service is configured correctly.

Element properties:

Target

Microsoft.LS.2010.Component.MediationServer

Category

EventCollection

Enabled

True

Event_ID

25089

Event Source

LS Mediation Server

Alert Generate

True

Alert Severity

Warning

Alert Priority

Low

Remotable

True

Alert Message

{0}

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

Event Log

Lync Server

Member Modules:

ID	Module Type	TypeId	RunAs
CollectEvent	DataSource	Microsoft.Windows.EventProvider	Default
WriteAlert	WriteAction	System.Health.GenerateAlert	Default
WriteToDB	WriteAction	Microsoft.SystemCenter.CollectEvent	Default
WriteToDW	WriteAction	Microsoft.SystemCenter.DataWarehouse.PublishEventData	Default

Source Code:

<Rule ID="Microsoft.LS.2010.Monitoring.Rule.InfoEvent.MediationServer_MEDIATIONSERVER_MRAS_CANDIDATES_CANNOT_BE_RESOLVED" Enabled="true" Target="Microsoft.LS.2010.Component.MediationServer" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="CollectEvent" TypeID="Windows!Microsoft.Windows.EventProvider">

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

      <LogName>Lync Server</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

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

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value Type="String">LS Mediation Server</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

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

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value Type="UnsignedInteger">25089</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="WriteToDB" TypeID="SC!Microsoft.SystemCenter.CollectEvent"/>

    <WriteAction ID="WriteAlert" TypeID="Health!System.Health.GenerateAlert">

      <Priority>0</Priority>

      <Severity>1</Severity>

      <AlertMessageId>$MPElement[Name="Alert_Mediation_Server_was_able_to_contact_the_A_V_Authentication_Service._However__there_were_no_valid_relay_candidates_returned_to_Mediation_Server.__Calls_may_still_work__but_the_Mediation_Server_will_not_be_able_to_send_calls_through_the_A_V_Authent..."]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>$Data/EventDescription$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue>$Data/EventDisplayNumber$</SuppressionValue>

        <SuppressionValue>$Data/PublisherName$</SuppressionValue>

        <SuppressionValue>$Data/LoggingComputer$</SuppressionValue>

      </Suppression>

    </WriteAction>

    <WriteAction ID="WriteToDW" TypeID="SCDW!Microsoft.SystemCenter.DataWarehouse.PublishEventData"/>

  </WriteActions>

</Rule>