Most businesses running Microsoft 365 treat every document the same — whether it's a staff lunch menu or a client's financial records. Sensitivity labels in Microsoft Purview let you classify your data and apply protection that travels with the document. This guide covers a practical four-level classification framework, how to get started with Microsoft 365 Business Premium, and why getting this right now is essential for safe AI adoption later.

Your Microsoft 365 tenant is probably working fine. But "working" and "secure" aren't the same thing. We break down the five areas where default configurations leave gaps — and what standards like the CIS Benchmark and Essential Eight actually expect.