Guidance for remediating oversharing across Microsoft 365 (SharePoint, OneDrive, Teams, Exchange) using the Secure & Governed Data Foundation blueprint - a three-pillar program (remediate oversharing, set up guardrails, meet regulations) built on SharePoint Advanced Management data access governance, sensitivity and container labels, secure-by-default labelling, Restricted Access Control, and Microsoft Purview. WHEN: Microsoft 365 oversharing, M365 oversharing, secure and governed data foundation, oversharing blueprint, too many people have access to SharePoint, EEEU everyone except external users, tighten permissions, data access governance report, restricted content discovery, secure by default labels, prepare data foundation, reduce sharing link sprawl, governed data estate. DO NOT USE for Copilot-specific readiness framing only (use purview-copilot-oversharing) or building a broad DLP program (use purview-dlp-policy).
How to install m365-oversharing?
vinayaklatthe/microsoft-security-skills/m365-oversharing
$npx -y skills add vinayaklatthe/microsoft-security-skills --skill m365-oversharingInstalls into the current project.
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Run `npx skills use "https://github.com/vinayaklatthe/microsoft-security-skills" --skill "vinayaklatthe/microsoft-security-skills/m365-oversharing"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/vinayaklatthe/microsoft-security-skills" that are relevant to the current task. Run `npx skills add "https://github.com/vinayaklatthe/microsoft-security-skills"` and select the relevant skills, then follow their instructions.
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