Security Guardian

Solve the five key challenges to effective identity security today.

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Identity Defense

Quest Identity Defense (previously known as Security Guardian) is an AI-powered, hybrid Active Directory security solution that continuously identifies identity risk, blocks unauthorized changes to critical Tier 0 assets, and instantly contains attacks before they spread.

With clear visibility and observability across human and non-human identities, organizations can investigate, respond, and remediate threats with simplicity and speed.

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Reduce identity risk across AD and Entra ID

Identity is now the primary attack surface, yet most organizations lack the visibility and protection needed to defend it.

Quest Identity Defense gives continuous insight into identity posture across Active Directory and Entra ID, benchmarking configurations against industry best practices and surfacing Tier 0 exposures, privilege risk, and non-human identity vulnerabilities before attackers exploit them. With dynamic Shields Up containment and proactive object protection, teams can stop attacks mid-flight and freeze changes to crown-jewel assets to limit blast radius.

Deep Active Directory auditing and AI-driven insights empower teams to cut through alert fatigue, detect and investigate threats faster, and improve mean time to respond (MTTR) by 44%.

Preventing extreme recovery measures

Quest provides critical identity protection

600
M

Identity attacks every day

80
%

Of organizations vulnerable to identity exposure

$
730
K

Cost of AD/Entra ID outage per hour

Key Benefits

Reduce attack surface

Minimize exposure to strengthen hybrid Active Directory security before attackers exploit risky configurations, privilege sprawl, and critical Tier 0 weaknesses.

Protect critical assets

Instantly stop in-progress attacks, limiting attacker lateral movement. Freeze critical objects to prevent compromise and avoid costly operational disruption.

Investigate and respond faster

Give teams the context they need to move from alert to action in minutes instead of hours.

Manage human and non-human identities

Gain critical visibility and observability across AD and Entra ID to secure both traditional identities and the growing population of non-human identities.

Improve audit readiness

Strengthen compliance posture with clear, human-readable auditing and a better understanding of critical identity assets and changes.

Cover the full identity security lifecycle

Manage the entire security lifecycle in a single interface. Our unified approach aligns with the NIST CSF framework, covering all pillars: Identify, Protect, Detect, Respond, Recover, and Govern.

Highlighted Features

102686
Hybrid AD visibility
Gain security-grade visibility to identify Tier 0, privileged paths, and exposures across human and non-human identities.
Identity posture management
Benchmark AD and Entra ID configurations against best practices to surface critical vulnerabilities and compromises, with remediation guidance.
Real-time threat defense
Proactively freeze critical objects, preventing compromise. Contain threats with Shields Up capability, stopping attacker movement and techniques in real time.
102686
Deep AD auditing
Human-readable auditing supports hybrid Active Directory security, revealing who changed what, when, where, and from which workstation to accelerate investigation.
AI-driven insight and remediation
Integrated AI translates identity telemetry into actionable security insights and remediation guidance to accelerate threat analysis and response.
Workload identity protection
Easily discover and secure service accounts and workload identities. Gain full visibility into their activities and prevent their compromise.

Knowledge Center

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Ready to secure Active Directory and Entra ID?

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FAQ

While Microsoft Defender for Identity (MDI) provides robust security, Quest Identity Defense offers additional specialized features that enhance hybrid Active Directory security and protection for your environment. The hybrid Active Directory security solution alerts on specific attacker tools, techniques, and procedures (TTPs) within AD and Entra ID, ensuring comprehensive threat detection. It enforces adherence to Privilege Account Management policies by hindering implicit relationships, especially concerning Tier 0 objects. Quest Identity Defense categorizes these critical objects and monitors any drifts from their known state. Furthermore, Quest Identity Defense proactively identifies, alerts on, and protects critical objects (including GPOs) from setting changes and database attacks. It also retains findings and audit data in compliance with retention requirements, ensuring thorough and compliant security management.

Quest Identity Defense enhances CrowdStrike Falcon AD by providing additional specialized features for your Active Directory environment. It alerts on specific attacker tools, techniques, and procedures (TTPs) within Active Directory and Entra ID, ensuring comprehensive threat detection. The hybrid Active Directory security solution enforces adherence to Privilege Account Management policies by hindering implicit relationships, particularly concerning Tier 0 objects. It automatically categorizes these critical objects and monitors any drifts from their known state. Additionally, Quest Identity Defense proactively identifies, alerts on, and protects against misconfigurations, such as Group Policy Object (GPO) setting changes and database attacks (DIT). It also retains findings and audit data in compliance with retention requirements, ensuring thorough and compliant security management.

Yes! SIEM solutions, like Microsoft Sentinel and Splunk, aggregate tremendous amounts of signals from various sources to provide comprehensive security monitoring. Quest Identity Defense enhances these solutions by being specifically built for AD and Entra ID. It scans and surfaces identity misconfigurations and exposures related to Tier 0 objects. The hybrid Active Directory security solution integrates seamlessly with SIEM tools through direct forwarding of findings via standard APIs, ensuring that all relevant data is included in your SIEM for a more robust and targeted hybrid Active Directory security posture.

Quest Identity Defense’s workload identity audit and detection provides visibility into service principals and other non-human accounts in AD and Entra ID. It identifies over-privileged or exposed accounts and provides actionable remediation guidance to prevent compromise before threats escalate.

At Quest, your privacy is our priority. When leveraging GenAI within Quest Identity Defense, we ensure that your data remains secure and private. The data used for AI-driven insights is processed within your own environment, and we do not share your data with third parties. Furthermore, we do not use or access anyone else's data to enhance or train our AI, only your data is used to provide relevant insights for your security needs.