Domain Controller Health Monitor Monitor

  • ID:  Microsoft.Windows.AD.DomainMemberPerspective.Availability.DomainControllerHealth.Monitor
  • Description:  Monitors the availability of Domain Controllers in the domain by attempting to bind to every advertising DC. It also binds to the GC port of any advertising DC. This monitor ignores off-line DCs (not responding to ping) and non-advertising DCs.
  • Target:  Active Directory Domain Member Perspective
  • Enabled:  Yes

Operational States

Name State Description
Domain Controller Health OK Success  
Domain Controller Health Error Error  

Overridable Parameters

Parameter Name Default Value Description Override
Interval (sec) 300  
Timeout Seconds 300  
Iterations before Alerting 3  
Target Local Site False  

Alert Details

Monitor State Message Priority Severity Auto Resolution
Domain Controller Health Error (Error) The Domain Controller Health monitor has failed. Medium Match Monitor Health Yes

Run As Profiles

Name
Default

Monitor Knowledgebase

Summary

This monitor verifies that the domain member can bind to the LDAP and GC port of all domain controllers in a domain.

If the DC does not respond to ping or is not advertising it will ignore it and rely on other monitors to determine if that is an issue.

If the DC is advertising it will bind to the LDAP port and if the DC is GC it will bind to the GC port. If a bind fails on any DC the monitor will raise an alert.

Causes

Possible causes of failures include the following:

  • The Netlogon Service is not running.

    The hard drives on the Domain Controller (DC) may be full, inspect free space on the DC.

    The Domain Controller is not healthy and may need to be replaced.

Resolutions

Ensure that the failing Domain Controller(s) are online and functioning correctly.

External References
This monitor does not contain any external references.

See Also for Active Directory (AD) Monitoring Management Pack


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