Email security in 2026 isn’t about enabling Defender and hoping it will sort everything out. If the fundamentals aren’t in place, the rest won’t hold. Real protection starts before the first policy with authenticated email, and continues across email, Teams, and how users actually behave.

In this session, we walk through a practical approach to email and collaboration security in Microsoft 365. We start with why SPF, DKIM, and DMARC are non‑negotiable. Without proper email authentication, even a well‑configured Defender for Office 365 setup will struggle with spoofing, phishing, and business email compromise (BEC).
From there, we focus on Defender for Office 365 best practices and what actually matters in real environments:

Anti‑phishing and impersonation protection that reduces real risk
Safe Links and Safe Attachments without ruining the user experience
When preset security policies are enough, and when custom tuning makes sense
Common misconfigurations that lead to blind spots or alert fatigue

Email is no longer the only entry point. We’ll also cover how Defender extends into Microsoft Teams, including protection against malicious links, files, and social engineering attacks that don’t rely on email at all.

We’ll show how Attack Simulator Training fits into a modern security strategy, not as a checkbox exercise, but as a way to reinforce controls, improve reporting, and close the gap between detection and response. The session is based on real customer environments and focuses on practical decisions, tradeoffs, and lessons learned.

Attendees will leave with:
- A clear understanding of why email authentication is foundational to Defender effectiveness
- Practical Defender for Office 365 configuration guidance for both email and Teams
- Insight into common operational mistakes and how to avoid them
- A realistic approach to combining technical controls with user awareness