Microsoft 365 Security Architecture

What Microsoft 365 Security Architecture teaches: design, justify, and defend one Zero Trust architecture across identity, devices, apps, and data, with detection, response, and governance, and walk away with a portfolio-grade package of ADRs, decision matrices, a risk register, diagrams, and an executive summary. The architecture you'll design, the artifacts you keep, and how the course is structured. Start here.

The foundation. Every authentication, every authorization, every access decision in M365 flows through Entra ID. This module teaches you to design the identity layer, tenant architecture, identity types and their attack surfaces, hybrid identity, directory structure, the identity lifecycle, naming governance, and group architecture, as deliberate architectural decisions with documented reasoning, mapped dependencies, and honest risk statements.

Design an authentication architecture that stops real attacks, beyond enabling MFA.

Design a systematic CA framework that's maintainable, auditable, and resilient to bypass.

Design a privilege model where administrative access is earned temporarily, not granted permanently.

Design a data protection framework that controls what happens to sensitive data after a legitimate user has access to it.

Design device trust as an architectural pillar, compliance policies that evaluate real security properties across four platforms, configuration baselines that prevent drift, custom compliance scripts for settings built-in rules can't check, BYOD strategy with app protection, MDE as a real-time risk signal, ASR rules promoted from audit to block, automated response boundaries, endpoint privilege management, and Autopilot provisioning that delivers compliant devices from the first sign-in.

Design the protection architecture for the attack surface where most breaches begin, email and collaboration.

Design the detection and investigation infrastructure, workspace topology, data connectors, log tiering, RBAC, and content deployment for Microsoft Sentinel.

Design the detection rule framework, analytics rule architecture, identity and email detection patterns, privileged activity monitoring, data exfiltration detection, alert tuning, and detection coverage measurement.

Design the incident response architecture, automation rules, containment playbooks, evidence preservation, incident workflows, communication procedures, and post-incident review.

Design the XDR operations architecture, unified schema, cross-domain correlation, attack disruption, custom detection rules, incident orchestration, Sentinel coexistence, and unified RBAC.

Design the identity governance architecture, access reviews, entitlement management, lifecycle workflows, HR-driven provisioning, workload identity governance, agent identity governance, and PIM integration.

Design the security posture measurement and compliance architecture, Secure Score interpretation, Compliance Manager assessments, framework mapping across ISO 27001, SOC 2, NIST CSF, and UK frameworks, maturity roadmaps, and executive communication.

Assemble, defend, threat-model, and present the complete M365 security architecture built across Modules 0–13, producing the portfolio-grade deliverable that survives your departure.

The commands, queries and decision criteria behind every architecture domain in the course, with what each answer settles and what it leaves open.

Ordered procedures for the architecture work that recurs: deploying a policy without an outage, reducing standing privilege, assessing a tenant, and retiring a control.

Building a tenant where you can deploy architecture, break it, and see what the controls actually do, without touching anything anyone depends on.

Architecture decisions worked end to end, including the ones where the correct answer was to deploy nothing and the ones where the design was right and still failed.

What to do when a decision is forced on you: a merger, an audit finding, a regulator, a breach elsewhere, a budget cut, or a product retirement.

Every practice surface available for this course, what each one actually gives you, and where the gaps are.

Microsoft documentation, security frameworks, compliance standards, threat intelligence, and vendor references used throughout the MSA course.

Microsoft 365 Security Architecture end-of-course exam: a three-phase simulation testing whether you can apply the method to a situation the course did not walk through.