Compare Microsoft Agent 365 vs. Quest Identity Defense

Agent 365 is Microsoft’s new enterprise framework for managing AI agents with the same rigor and structure used for human users. It centralizes oversight by providing a registry that surfaces every agent operating within your organization, including identity-secured agents, internally registered agents, and automatically detected shadow agents. The platform enhances security by extending Microsoft Defender protections, Entra identity access controls, and Purview governance policies to all agents. Agent 365 integrates with Microsoft 365, Power Apps, Power Automate, and Power BI, enabling agents to participate in workflows, analytics, and productivity tasks just like any other digital worker. Using Work IQ, organizations can equip agents with deep contextual understanding sourced from company data, relationships, and internal systems. This unified approach simplifies deployment, strengthens compliance, and improves operational insight for IT teams. Through Microsoft’s Frontier early access program, IT admins can explore and activate Agent 365 directly in the Admin Center. Microsoft built Agent 365 to support the rapidly growing role of AI agents across enterprise environments, ensuring they remain secure, governed, and aligned with organizational standards.

Quest Identity Defense, previously known as Security Guardian, is a hybrid identity security platform for protecting Active Directory and Microsoft Entra ID from identity-based threats. The platform continuously observes human and non-human identities to identify Tier 0 exposures, privileged attack paths, risky configurations, anomalous behavior, and other identity vulnerabilities. Identity posture management compares AD and Entra ID configurations with security best practices and provides guidance for remediating identified weaknesses. Proactive object protection helps prevent critical Tier 0 assets from being improperly changed or compromised rather than relying exclusively on rollback after an incident. Quest's Shields Up functionality and agentic AI defense capabilities can automatically freeze at-risk users or critical objects, contain active threats, and limit attacker lateral movement. Continuous anomaly monitoring and detailed auditing show who changed what, when and where the activity occurred, and the workstation from which a change originated. AI-driven analysis converts identity telemetry into security insights and remediation guidance intended to help teams investigate threats and respond more quickly. A flexible API enables organizations to integrate Identity Defense information with existing security tools and custom workflows, while the platform is also designed to support audit and compliance requirements. Quest Identity Defense covers identity security functions across the Identify, Protect, Detect, Respond, Recover, and Govern pillars of the NIST Cybersecurity Framework and is FedRAMP High authorized.