The office has no walls anymore. Employees sign in from laptops at home, phones at the airport, and tablets nobody in IT ever touched — and every one of those devices is a door into your organization's data. Microsoft Intune is the lock on that door, but most administrators only ever learn enough of it to keep the lights on, not enough to actually defend their organization. This book closes that gap. Written for IT administrators, security professionals, and anyone responsible for managing devices in a Microsoft 365 environment, it moves beyond admin-center screenshots and menu paths to teach the reasoning behind every major decision: when to choose MDM over MAM, how to structure a rollout that won't collapse under its own complexity, why a compliance policy is worthless until it's wired into Conditional Access, and how Defender for Endpoint's risk score can lock down a compromised device before a human even notices the alert. Across eight chapters, real case studies, and hands-on exercises, you'll build a complete mental model of modern endpoint management — from enrolling your first Windows, iOS, Android, and macOS device, through application deployment, Zero Trust access policy, and endpoint security, all the way to PowerShell automation and Microsoft Graph scripting. A glossary, licensing reference, troubleshooting checklist, and a 30-60-90 day deployment plan in the Bonus Kit turn the book into a working tool you'll keep open long after you've finished reading it. Practical, current, and free of vendor jargon, this is the Intune book for people who want to actually run a tenant — not just pass a certification exam.