Prevent oversharing in Microsoft 365 Copilot: deployment blueprint

Oversharing is one of the most common risks organizations encounter when deploying Microsoft 365 Copilot. Because Copilot surfaces information that users already have permission to access, overly broad sharing can expose content to a wider audience than intended.

This deployment blueprint provides a prescriptive, phased approach to identifying and reducing oversharing risk when deploying Microsoft 365 Copilot. It's designed for administrators who want clear, actionable guidance.

The blueprint is organized into three phases:

• Pilot (optional)
• Deploy
• Operate

The blueprint includes:

• Common causes of oversharing in SharePoint and OneDrive
• A staged remediation approach aligned to Copilot deployment
• Recommended actions for Microsoft 365 E3 and E5 environments
• Operational guidance using SharePoint Admin Center, SharePoint Advanced Management (SAM), and Microsoft Purview

Download the blueprint and documentation

Deployment model	Description
	Use this blueprint to identify, prioritize, and mitigate oversharing risks during Microsoft 365 Copilot deployment. Includes: - Blueprint overview and activities: PDF | PowerPoint

Deployment context

This blueprint focuses specifically on oversharing remediation. For broader deployment planning and readiness, see:

• Prepare and deploy Microsoft 365 Copilot in E3 and E5 environments

Related guidance

• Microsoft Purview blueprint: Secure by default