Microsoft Defender for Office 365 (Plan 2)

Microsoft Defender for Office 365 protects email, collaboration, and identities against phishing, malware, and sophisticated attacks. Plan 2 adds advanced investigation and response, Threat Explorer real‑time detection, Attack simulation training, and automated remediation to reduce risk and response time. It integrates with Exchange Online, SharePoint, OneDrive, and Microsoft Teams to safeguard links and attachments with Safe Links and Safe Attachments, and offers post‑delivery protection and detailed threat analytics. Built on Microsoft 365 security, it supports hunting, investigation, and policy tuning for evolving threats. Designed for organizations that need comprehensive protection and faster incident response within Microsoft 365.

Source: Microsoft Learn and product documentation (Defender for Office 365 overview; Plan 1 vs. Plan 2 capabilities).