PDC LDAP Bind Availability Monitor - Microsoft.Windows.AD.DomainMemberPerspective.Availability.PDC.Bind.Monitor (UnitMonitor)

Microsoft.Windows.AD.DomainMemberPerspective.Availability.PDC.Bind.Monitor (UnitMonitor)

Monitors the availability of the PDC by performing LDAP binds to it.

Knowledge Base article:

Summary

This monitor verifies the availability of the PDC FSMO using an LDAP (Lightweight Directory Access Protocol) request. It periodically binds to the Domain Controller to verify the availability using an LDAP query.

Configuration

IntervalSeconds: How frequently the monitor is run (seconds)

Causes

Possible causes include the following:

The domain controller needs resizing.
The domain controller is a bridgehead server, and it is compressing large amounts of data because a bulk load must be replicated inter-site.
One or more other domain controllers failed, and their load transferred to this domain controller because it is now the closest available domain controller.
An application is placing a heavy load on the domain controller. This is usually caused by inefficient, CPU-intensive operations such as non-indexed queries.
The domain controller is critically low on memory.
The domain controller is under a denial-of-service attack.

Resolutions

View the error description in the alert for additional information.

View the overall system performance of the machine to determine if it needs additional resources.

Add additional domain controllers to help load-balance the load.

Ensure that there are a sufficient number of DCs in the active AD sites.

External

Capacity Planning for Active Directory Domain Services

Element properties:

Target

Microsoft.Windows.Server.AD.DomainMemberPerspective

Parent Monitor

System.Health.AvailabilityState

Category

AvailabilityHealth

Enabled

True

Alert Generate

True

Alert Severity

MatchMonitorHealth

Alert Priority

Normal

Alert Auto Resolve

True

Monitor Type

Microsoft.Windows.AD.DomainMemberPerspective.Availability.PDC.Bind.Monitortype

Remotable

False

Accessibility

Public

Alert Message

The PDC LDAP Bind Availability health monitor has failed.

The health monitor script failed with an error.
Error: {0}

RunAs

Default

Source Code:

<UnitMonitor ID="Microsoft.Windows.AD.DomainMemberPerspective.Availability.PDC.Bind.Monitor" Target="AD!Microsoft.Windows.Server.AD.DomainMemberPerspective" TypeID="Microsoft.Windows.AD.DomainMemberPerspective.Availability.PDC.Bind.Monitortype" Accessibility="Public" Enabled="true" Remotable="false" ParentMonitorID="SystemHealth!System.Health.AvailabilityState"> <Category>AvailabilityHealth</Category> <AlertSettings AlertMessage="Microsoft.Windows.AD.DomainMemberPerspective.Availability.PDC.Bind.Monitor.AlertMessage"> <AlertOnState>Warning</AlertOnState> <AutoResolve>true</AutoResolve> <AlertPriority>Normal</AlertPriority> <AlertSeverity>MatchMonitorHealth</AlertSeverity> <AlertParameters> <AlertParameter1>$Data/Context/Property[@Name='ErrorString']$</AlertParameter1> </AlertParameters> </AlertSettings> <OperationalStates> <OperationalState HealthState="Success" MonitorTypeStateID="PdcOK" ID="PdcOK"/> <OperationalState HealthState="Error" MonitorTypeStateID="PdcError" ID="PdcError"/> </OperationalStates> <Configuration> <IntervalSeconds>300</IntervalSeconds> <BindIterations>3</BindIterations> <TimeoutSeconds>300</TimeoutSeconds> </Configuration> </UnitMonitor>