Phishing is no longer just about a user clicking a bad link. In modern Microsoft 365 environments, a single successful phish can lead to token theft, session replay, and full account takeover without triggering traditional alerts.

This session focuses on what actually happens after a phishing attack succeeds, based on real-world incidents and customer environments. We walk through the full attack chain, from the initial user interaction to how attackers leverage tokens, sessions, and trusted identity to move inside the tenant.

You’ll see how Defender for Office 365 processes user-reported phishing, what signals are generated, and where detection can fall short. We’ll trace attacks across mail flow, URLs, identities, and user activity, using the same investigation paths available in real incidents, including Threat Explorer, submissions, and incident queues in the Defender portal.

The session also covers how modern SOC capabilities are evolving. Using Security Copilot and the Phishing Triage Agent, we look at how organizations can reduce noise, prioritize real threats, and improve response quality by automating the analysis of user-reported phishing and enabling faster decision-making.

A key part of the session is understanding identity compromise. From revoking sessions and removing persistence to strengthening policies and improving detection, you’ll leave with practical steps to handle incidents and reduce the likelihood of recurrence.
This session is not theoretical. It is built on real attacks, real mistakes, and the operational reality of responding to phishing in modern Microsoft 365 environments.

A successful phish is often an identity attack, not a mail problem
Modern phishing leads to token theft and session hijacking, allowing attackers to bypass MFA and operate as the user.

Detection depends on signals across multiple workloads
Effective investigation requires correlating email, user reports, Defender alerts, and identity activity to understand what actually happened.

Response speed and quality improve with automation and user reporting
User-reported phishing, combined with tools like the Phishing Triage Agent and automated investigation, helps reduce noise and accelerate incident response.