1.1. What Microsoft 365 Actually Is (and Why It's More Than Office)

💡 First Principle: Microsoft 365 is a collection of cloud services that your organization rents from Microsoft — and the rules about who can access what are enforced by an identity layer, not by your network or device.

Most people think of M365 as "Office in the cloud." That mental model works for users, but it fails administrators. When something breaks, when you need to govern AI access, or when you're trying to understand how data flows, you need to think of M365 as a platform of interconnected cloud services all hanging off a shared identity system. The services — Exchange Online, SharePoint, Teams, Purview, Copilot — are just the visible parts. The identity layer underneath is what makes governance possible.

Without this model, exam questions about "where do you configure X" or "why can't user Y access Z" become guesswork. With it, they become logic problems.

⚠️ Common Misconception: Many candidates treat M365 as one monolithic product. In reality, it's a suite of distinct cloud services. Each has its own admin center, its own objects, and its own configuration surface — but they all share the same identity system (Microsoft Entra ID).