Quest Change Auditor

Overview

Quest Change Auditor provides real-time auditing, alerting, and change tracking across Active Directory, Entra ID, and related Microsoft infrastructure such as Exchange, SQL Server, and file systems. Quest is a long-established enterprise software vendor (founded 1987, now owned by Clearlake Capital), and Change Auditor is a mature, on-premises-oriented product rather than a cloud-native ITDR newcomer. It answers the question of who changed what, when, and from where. For category framing, see what ITDR is and why it matters.

What it is good at

Deep, granular AD change auditing is the strength, with detailed who-what-when-where event capture, real-time alerting on sensitive changes, and the ability to track and in some cases roll back unwanted modifications. Years of enterprise maturity show in its reporting, compliance evidence, and integration with the broader Quest identity portfolio. For regulated organizations needing a defensible audit trail of directory changes, it is hard to beat.

Where it falls short

It is on-prem-oriented and Microsoft-focused, so it is narrower than modern cloud-native ITDR. It centers on change auditing rather than behavioral attack detection, attack-path analysis, or SaaS identity coverage. Deployment and administration carry the weight of a traditional enterprise product. Teams wanting a lightweight, SaaS-first detection tool will find it heavier than needed.

Pricing

Quote-based licensing through Quest sales, typically perpetual or subscription with maintenance. Model it against alternatives with the TCO calculator.

Best for, and who should look elsewhere

A strong fit for enterprises that need detailed Active Directory auditing, alerting, and change control, particularly for compliance. Look elsewhere if you want cloud-native, SaaS-first ITDR or broad SaaS identity coverage. Compare with AD-centric peers Cayosoft, Tenable Identity Exposure, Semperis and the Silverfort vs Semperis analysis.

Bottom line

A mature, dependable choice for detailed Active Directory auditing and change control, best for Microsoft-heavy enterprises with strong compliance needs. Browse the ITDR vendor directory for more.