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By Errin O'Connor, Founder & Chief AI Architect, EPC Group

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Security

Microsoft 365 Security Baseline

Enterprise security configuration guide

A comprehensive security baseline for Microsoft 365 environments. This guide provides recommended configurations for identity, data protection, threat protection, and compliance across the Microsoft 365 suite.

55 pages
3 hours
January 2026
15,678 downloads
PDF Document
5.2 MB
EO
Errin O'Connor
Founder & Chief AI Architect

Microsoft Press bestselling author with enterprise consulting experience since 1997.

What's Inside

  • Conditional Access policy templates
  • MFA deployment guide
  • DLP policy configuration
  • Defender for Office 365 setup
  • Sensitivity label taxonomy
  • Audit log retention policies
  • Security score optimization
  • Compliance manager setup

Table of Contents

1Security Framework Overview
Pages 1-8
2Identity & Access Management
Pages 9-18
3Device Management & Compliance
Pages 19-28
4Information Protection
Pages 29-38
5Threat Protection
Pages 39-48
6Compliance & Audit
Pages 49-53
7Implementation Checklist
Pages 54-55

Preview

Securing Microsoft 365 requires a layered approach that addresses identity, devices, data, and applications. This security baseline provides prescriptive guidance based on Microsoft best practices and real-world enterprise deployments. We'll cover the essential security controls every organization should implement, from foundational MFA requirements to advanced threat protection configurations...

Who Should Read This

  • Security Administrators
  • Microsoft 365 Administrators
  • Compliance Officers
  • CISOs and Security Leaders
  • IT Auditors

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