Microsoft 365 Oversharing Remediation

Oversharing - content shared more broadly than it should be - is the root cause of most data exposure in Microsoft 365 and the biggest risk amplified by AI. Microsoft's Secure & Governed Data Foundation blueprint structures remediation into three pillars: remediate oversharing, set up guardrails, and meet regulations. The work is powered by SharePoint Advanced Management (SAM, included with a Microsoft 365 Copilot license), sensitivity and container labels, and Microsoft Purview.

When to use

Building a secure, well-governed Microsoft 365 data estate - reducing who can reach what across SharePoint, OneDrive, Teams, and Exchange, then keeping it that way with enforceable defaults. Applies whether or not Copilot is in scope; it is the data-foundation work every AI or data program depends on.

Do not use this skill when the question is purely Copilot rollout readiness framing (use purview-copilot-oversharing), monitoring sensitive data in AI prompts (use purview-dspm-ai), or designing a tenant-wide DLP program (use purview-dlp-policy).