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Change Auditor for Active Directory Queries

Solve migration and performance issues by analyzing Active Directory queries. Change Auditor for Active Directory Queries provides real-time tracking, analysis and reporting on any Active Directory LDAP query. By detecting any AD query in real time, you can eliminate the time required for auditing and easily determine the source of queries prior to a directory migration or consolidation. You can also measure domain controller performance and translate query data into the simple terms of who, what, when, where and originating machine.
Change Auditor for Active Directory Queries
Change Auditor for Active Directory Queries provides real-time tracking, analysis and reporting on all Active Directory-based and LDAP queries.
Determining what applications and users are accessing Active Directory (AD) is nearly impossible using Microsoft-provided tools, fraught with risk and can cause AD environments to come to a crashing halt if not monitored correctly. Change Auditor for Active Directory Queries provides real-time tracking, analysis and reporting on LDAP queries, eliminating the time and complexity required for auditing.

Key Benefits

Detail AD queries

Identify the who, what, where, when and originating machine for each query in simple terms, saving the administrator time normally spent digging for more details.

Secure and signed

Identify queries against Active Directory (AD) that do not conform to your internal security policy because they are not secure or signed.

Domain controller performance

Show which workstations and servers are performing LDAP queries that can affect domain controller performance.

Migration discovery process

Learn what machines need connectivity to LDAP during and after a migration.

Real-time alerts on the move

Send critical change and pattern alerts to email and mobile devices to prompt immediate action, even while you're not on site.

Auditor-ready reporting

Generate best practice reports for regulatory compliance mandates such as GDPR, SOX, PCI-DSS, HIPAA, FISMA, GLBA and more.


Security timelines

View, highlight and filter change events and discover their relation to other security events in chronological order across your Microsoft environment for better forensic analysis and security incident response.

SIEM integration

Enrich SIEM solutions including Sentinel, Splunk, ArcSight, QRadar or any platform supporting Syslog by integrating Change Auditor’s detailed activity logs.

Improved security insights

Correlate disparate IT data from numerous systems and devices into IT Security Search, an interactive search engine for fast security incident response and forensic analysis. Include user entitlements and activity, event trends, suspicious patterns and more with rich visualizations and event timelines.

Related searches

Provide instant, one-click access to all information on the change you're viewing and all related events, such as what other changes came from specific users and workstations, eliminating additional guesswork and unknown security concerns.

Superior auditing engine

Remove auditing limitations and captures change information without the need for native audit logs, resulting in faster results and significant savings of storage resources.

North Central Texas Council of Government

If high-severity events occur, Change Auditor alerts us by email, so we can determine whether the change was made properly through our change management process or is a malicious act by a hacker.

Brett Ogletree Information Security Officer, North Central Texas Council of Government Read Case Study

Stevie Awards 2018 People’s Choice winner

In the 2018 Stevie Award’s People Choice awards, Change Auditor was voted best software and also won a Silver Stevie for best new product of 2018.


There are specific system requirements for the Change Auditor coordinator (server-side), Change Auditor client (client-side), Change Auditor agent (server-side), and the Change Auditor workstation and web client (optional components). For a full list of system requirements and required permissions for all components and target systems that can be audited by Change Auditor please refer to the Change Auditor Installation Guide.

The Change Auditor coordinator is responsible for fulfilling client and agent requests and for generating alerts.


Quad core Intel® Core™ i7 equivalent or better


Minimum: 8 GB RAM or better

Recommended: 32 GB RAM or better

SQL Server

SQL databases supported up to the following versions:

  • Microsoft SQL Server 2014 SP3
  • Microsoft SQL Server 2016 SP3
  • Microsoft SQL Server 2017
  • Microsoft SQL Server 2019
  • Azure SQL Managed Instance (PaaS) with SQL authentication or Azure Active Directory authentication

NOTE: Performance may vary depending on network configuration, topology, and Azure SQL Managed Instance configuration.

NOTE: Change Auditor supports SQL AlwaysOn Availability Groups, SQL Clusters, and databases that have row and page compression applied.

Operating system

Installation platforms (x64) supported up to the following versions:

  • Windows Server 2012
  • Windows Server 2012 R2
  • Windows Server 2016
  • Windows Server 2019
  • Windows Server 2022

NOTE: Microsoft Windows Data Access Components (MDAC) must be enabled. (MDAC is part of the operating system and enabled by default.)

Coordinator software and configuration

For the best performance, Quest strongly recommends:

  • Install the Change Auditor coordinator on a dedicated member server.
  • The Change Auditor database should be configured on a separate, dedicated SQL server instance.

NOTE: Microsoft ODBC Driver 17 for SQL Server is required when the Change Auditor database resides on Azure SQL Managed Instance and Azure Active Directory authentication is selected.

NOTE: Do NOT pre-allocate a fixed size for the Change Auditor database.

In addition, the following software/configuration is required:

  • The coordinator must have LDAP and GC connectivity to all domain controllers in the local domain and the forest root domain.
  • x64 version of Microsoft’s .NET 4.7.1
  • x64 version of Microsoft XML Parser (MSXML) 6.0
  • x64 version of Microsoft SQLXML 4.0
Coordinator footprint
  • Estimated hard disk space used: 1 GB.
  • Coordinator RAM usage is highly dependent on the environment, number of agent connections, and event volume.
  • Estimated database size will vary depending on the number of agents deployed and audited events captured.

Additional Account Coordinator minimum permissions required, please see Change Auditor Installation Guide .


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Solve migration and performance issues by analyzing Active Directory queries.

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