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Active Administrator 8.5 - User Guide

Active Administrator Overview Certificates Security & Delegation  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 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 DFSR RDC not enabled DFSR sharing violation DFSR staged file age DFSR staging area disk space DFSR USN records accepted DFSRS CPU load 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 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

DNS Client Service is not running

Indicates the DNS Client Service is currently not running on the domain controller.

Category: Windows Services
Name: DNS Client
Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019
Required permissions: When monitored locally or remotely, domain administrator privilege is required.

The Directory Analyzer agent periodically checks to ensure DNS Client Service is running.

Use the Services MCC snap-in or another SCP application to restart the DNS Client Service.

Domain controller CPU load

Indicates that the CPU for the domain controller is too busy, which may indicate a problem with directory service or it can indicate that a problem may occur because the domain controller cannot respond to requests quickly enough.

Category: Performance Counters
Name: CPU Processor time
Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019
Required permissions: When monitored locally and remotely, only domain user privilege is required and the user must be a part of the Performance Logs user group.

The Directory Analyzer agent monitors the Processor\% Processor Time performance counter on the domain controller. If the value of the performance counter goes above the configured threshold for a period exceeding the configured duration, the agent will set this alert condition.

Increased CPU load is a result of running too many applications on the server, or running applications that require too much CPU time.

It is also possible that the CPU load has increased due to some pathological condition in a particular application. For instance, Active Directory® itself requires substantial CPU resources when it is processing inherited Access Control Lists (ACLs). Active Directory can also require a lot of CPU resources when it processes complex, non-indexed directory searches.

First, try to determine if the increased CPU load is due to a particular program, or if it is due to running too many programs. Use a utility like Task Manager to inspect the CPU usage of all processes on the system. If there are several processes getting more than 10% of the CPU, then the problem is most likely due to running too many programs on the server. If possible, stop some of the programs.

If one process is using all of the CPU for an extended period of time, it may be due to a bug in the software, or it may be that the program just requires too much CPU. If possible, stop the program and run it on a different computer.

Domain controller page faults

Indicates that the performance of the server may be degraded because of too many page faults.

Category: Performance Counters
Name: Memory page faults a second
Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019
Required permissions: When monitored locally and remotely, only domain user privilege is required and the user must be a part of the Performance Logs user group.

The Directory Analyzer agent constantly monitors the Page Faults/sec performance counter on the domain controller. If this number exceeds the configured threshold, the agent will issue an alert.

A page fault occurs whenever the operating system tries to access a virtual memory page that is not currently in memory or is in the incorrect place in memory. The process requesting the page must wait while the operating system makes room for the requested page in memory and reads it from disk or relocates it, which may cause a significant delay for the faulting process. If many processes are causing page faults, a condition known as thrashing can occur. If this happens, the performance of the server goes to zero as the operating system spends most of its time managing memory and very little running applications.

A continuously high page fault rate is an indication that the server is running too many processes with insufficient real memory. If left unattended, Active Directory® performance will suffer greatly, and eventually the directory system agent (DSA) will be unable to service requests, which can result in failed logins and authentications, as well as the inability of some applications and services to run at all.

First, determine if the page fault rate is too high or if the threshold is set too low. Assess the overall performance of the server while the page fault rate is high. If the performance seems adequate, increase the threshold; if the performance seems poor, try to reduce the page fault rate.

To reduce the page fault rate on the server, determine if the page faults are due to a single process or a combination of several processes.

2
Select View | Select Columns.
3
Select Memory Delta and Page Fault Delta, if necessary.

If there is only one process, run that program on another server or at a different time when the server is not as loaded.

If there are several processes that are generating high page fault rates, you will either have to run some of them on another server, or you will have to add more RAM to the server.

Domain controller unresponsive

Supported on: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019
Required permissions: Domain user privilege required.

Active Administrator Data Service (ADS) periodically monitors TCP port 135. If ADS cannot connect to port 135, the alert is triggered.

This error can occur if any of the following occurs:

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