MetaDefender for Microsoft 365 is a software-as-a-service (SaaS) email security solution designed to protect cloud-based Microsoft email environments against phishing, malware, and exploits. It integrates directly with Microsoft 365 via the Graph API to provide multilayered threat protection capabilities without requiring on-premises infrastructure. The platform incorporates multiscanning, deep content disarm and reconstruction (CDR), real-time anti-phishing, adaptive sandboxing, and proactive data loss prevention (DLP) to secure user mailboxes.