Microsoft 365 Copilot Security: Proven Guide to Avoid Risk
Copilot reads whatever each user can already reach, so every permission mistake your tenant has accumulated becomes searchable the day you switch it on. This guide covers the hardening work that belongs before the licences arrive — finding oversharing and EEEU sprawl, tightening identity, applying sensitivity labels, using Restricted SharePoint Search as a temporary brake, clearing stale content, enabling DLP and audit, auditing guests, and proving it all with a red-teamed pilot and a 90-day plan.