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DSAccess lost contact with all Global Catalogs in the site.

DSAccess_lost_contact_with_all_Global_Catalogs_in_the_site (Rule)

Knowledge Base article:

Summary

No suitable global catalog servers exist in the local site.

DSAccess will use out-of-site global catalog servers. However, out-of-site global catalog servers might respond slower, which can result in message queuing and network saturation. Ensure that the local site has enough global catalog servers for Exchange.

Causes

Resolutions

DSAccess will automatically detect and use a global catalog server in the local site within five minutes after one becomes available.

The loss of all global catalogs in a site is an unusual occurrence that must be investigated.

Use the nltest /dsgetdc: /site:<local site name> command to verify that a global catalog server can be located in the local site. Look for the global catalog server flag in the nltest output. The NLTest tool is installed with the Windows support tools.

External

For more information about MSExchangeDSAccess event 2085, see:

Element properties:

TargetMicrosoft.Exchange.ExchangeComponent.IS
CategoryEventCollection
EnabledTrue
Event_ID2085
Event SourceMSExchangeDSAccess
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityNormal
RemotableTrue
Alert Message
DSAccess lost contact with all Global Catalogs in the site.
{0}
Event LogApplication

Member Modules:

ID Module Type TypeId RunAs 
EventDS DataSource Microsoft.Windows.EventProvider Default
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="DSAccess_lost_contact_with_all_Global_Catalogs_in_the_site" Enabled="onEssentialMonitoring" Target="Exch2003Core!Microsoft.Exchange.ExchangeComponent.IS" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>EventCollection</Category>

  <DataSources>

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

      <ComputerName>.</ComputerName>

      <LogName>Application</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>EventDisplayNumber</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>2085</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>PublisherName</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>MSExchangeDSAccess</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

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

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertOwner>$Data/PublisherName$</AlertOwner>

      <AlertMessageId>$MPElement[Name="DSAccess_lost_contact_with_all_Global_Catalogs_in_the_site.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

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

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>