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Active Administrator 8.4 - User Guide

Active Administrator Overview Certificates Security & Delegation Azure Active Directory  Active Directory Health
Switching to Active Directory Health Using the Active Directory Health landing page Installing Active Directory Health Analyzer agents Using the Active Directory Health Analyzer agent configuration utility Excluding domain controllers Managing the Remediation Library Analyzing Active Directory health Analyzing Azure Active Directory Managing Active Directory Health Analyzer alerts Managing alert notifications Pushing alerts to System Center Operations Manager and SNMP managers Managing monitored domain controllers Managing data collectors Active Directory Health Templates Managing Active Directory Health Analyzer agents Using the Troubleshooter Recovering Active Directory Health data
Auditing & Alerting Group Policy Active Directory Recovery Active Directory Infrastructure DC Management DNS Management Configuration
Using the Configuration landing page Managing tasks Defining role-based access Setting email server options Configuring SCOM and SNMP Settings Configuring Azure Active Directory Setting notification options Setting Active Template options Setting agent installation options Setting recovery options Setting GPO history options Setting certificate configuration Setting service monitoring policy Managing archive databases Migrating data to another database Setting a preferred domain controller Setting up workstation logon auditing Managing configuration settings Setting user options Managing the Active Directory server
Diagnostic Console Alerts Appendix
Domain controller alerts
Active Directory Certificate Services service is not running Active Directory Domain Services is not running Active Directory Web Services service is not running Consecutive replication failures DC cache hits DC DIT disk space DC DIT log file disk space DC LDAP load DC LDAP response too slow DC Memory Usage DC properties dropped DC RID pool low DC SMB connections DC SYSVOL disk space DC time sync lost Detected NO_CLIENT_SITE record DFS Replication service not running DFS service is not running DFSR conflict area disk space DFSR conflict files generated DFSRS CPU load DFSR RDC not enabled DFSR sharing violation DFSR staged file age DFSR staging area disk space DFSR USN records accepted DFSRS unresponsive DFSRS virtual memory DFSRS working set DNS Client Service is not running Domain controller CPU load Domain controller page faults Domain controller unresponsive File Replication Service is not running File replication (NTFRS) staging space free in kilobytes GC response too slow Group policy object inconsistent Hard disk drive Intersite Messaging Service is not running Invalid primary DNS domain controller address Invalid secondary DNS domain controller address KDC service is not running LSASS CPU load LSASS virtual memory LSASS working set Missing SRV DNS record for either the primary or secondary DNS server NETLOGON not shared NetLogon service is not running Orphaned group policy objects exist Review the reported orphaned GPO folders in the local SYSVOL and remove any that are obsolete. Physical memory Power supply Primary DNS resolver is not responding Secondary DNS resolver is not responding Security Accounts Manager Service is not running SRV record is not registered in DNS SYSVOL not shared W32Time service is not running Workstation Service is not running
Domain alerts Site alerts Forest alerts Azure Active Directory Connect alerts
Event Definitions PowerShell cmdlets

Operating System components

The following table describes the operating system components:

CPU Usage

The total amount of CPU being used on the computer being monitored. It includes CPU consumed by all Windows® processes. This component opens the CPU drilldown.

System Disk (Free Space/Total Space)

The total unused disk space on the system disk (the disk that houses the Windows operating system). There should be enough free disk space to accommodate the operational requirements of the Windows operating system. Total space refers to the total size of the system disk.

Physical RAM

The amount of physical memory (RAM) Windows is using. Physical memory usage normally remains close to the total amount of physical memory installed on the system unless the amount of physical memory exceeds the amount of virtual memory that Windows is using. Windows normally keeps some physical memory available for immediate reuse. This component opens the Memory drilldown.

Processor Queue

The number of process threads (program execution units) waiting to be run on all processors. A sustained processor queue length can indicate processor congestion. This component opens the CPU drilldown.

Top CPU Consumer

The process name that is consuming the most CPU on this domain controller. This component opens the Top CPU Consumers tab on the Performance drilldown.

Top Memory Consumer

The process name that is consuming the most physical memory on this domain controller. This component opens the Top Memory Consumers tab on the Performance drilldown.

Using indicators

Indicators give more information about the selected domain controller. The indicator is green if it is active. Hold the cursor over an indicator to see a definition and any current alarms.

Table 132. Indicators


Indicates if the domain controller is an Intersite Topology Generator (ISTG). An ISTG considers the cost of intersite connections, checks if previously available domain controllers are no longer available, and checks if new domain controllers have been added. The Knowledge Consistency Checker (KCC) then updates the intersite replication topology accordingly.


Indicates if the domain controller is a Global Catalog. The Global Catalog stores full replicas of all object attributes created within the domain and also partial replicas of all object attributes within other domains in the forest.


Indicates if the domain controller is the Schema Master for its forest. All changes to the schema of a forest must be made on that computer. There is only one Schema Master for a forest.


Indicates if the domain controller is the Domain Naming Master for its forest.

Each forest has only one Domain Naming Master. The Domain Naming Master is contacted whenever a new domain is added to the forest to ensure its name is unique.


Indicates if the domain controller is the RID Master for its domain.

The RID Master is responsible for handing out RID pools to the other domain controllers in a domain. A RID pool is used to generate RIDs, which are a part of every object created by Active Directory. There is one RID Master per domain.


Indicates if the domain controller is the Infrastructure Master for its domain.

Each domain has an Infrastructure Master, which is used to maintain the integrity of Active Directory's internal database.


Indicates if the domain controller is the PDC Emulator for its domain. The PDC Emulator acts like the PDC for pre-Windows® 2000 applications and performs time synchronization for the enterprise. It is contacted by default when other domain controllers in the domain fail to authenticate. Password changes are duplicated here as well. There is one PDC Emulator per Active Directory domain.


Shows if the domain controller is a Read-Only Domain Controller (RODC).

Using drilldowns

Drilldowns display detailed information about the domain controller you are analyzing.

The Diagnostic Console is designed to help you locate and identify problem areas quickly using a visual representation of the major components in the domain controller being monitored. When you have isolated a problem, you can see a detailed breakdown by viewing a drilldown that displays the underlying statistics.

You can display drilldowns by clicking a component in the main screen or by clicking a drilldown button on the toolbar. You can modify the way drilldowns display information.

Each drilldown page contains displays that provide you with specific information about the components of your system. Drilldowns mainly use two different types of displays - tables and charts. Drilldowns have the following features:

The Diagnostic Console provides the following drilldowns:

Performance drilldown

Displays information on the applications running on a domain controller, including the process name and ID of the application, the percentage of CPU usage, and the physical memory usage in megabytes.

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