Egress Defend is a self-learning and adaptive anti-phishing solution that uses behavioral AI and self-adapting technology to detect and protect against sophisticated threats that bypass Microsoft's native security and legacy secure email gateways. It leverages machine learning, natural language processing, and natural language understanding to detect attacks, including business email compromise. Egress Defend operates as part of the Egress Intelligent Email Security suite, employing an adaptive security architecture that automatically adjusts its security controls based on real-time risk assessments. It integrates into Microsoft 365 via SMTP and Graph API, operating after a Secure Email Gateway.