Microsoft Copilot (Microsoft 365): Improved Python-powered answers in Copilot in Excel

🚨 The Signal: Copilot in Excel now uses Python for improved data analysis answers. This introduces new data processing pathways and potential for data exfiltration or misuse via Python execution within Excel.

The Impact

All users interacting with Copilot in Excel are affected, increasing the risk of sensitive data exposure and unapproved code execution.

• End users: Risk of inadvertently processing sensitive data through Copilot's Python engine.
• Security teams: Increased attack surface from Python execution within Excel, requiring new monitoring.
• Data owners: Potential for data exfiltration or non-compliant data processing via Python scripts.
• Compliance officers: New challenges in maintaining data residency and audit trails for Python-driven analysis.

The Action

1. Review and update Microsoft 365 Copilot data governance policies to explicitly address Python execution in Excel.
2. Implement Microsoft Purview Data Loss Prevention (DLP) policies to monitor and restrict sensitive data processed by Copilot in Excel.
3. Educate users on the responsible use of Copilot in Excel, emphasizing data sensitivity and approved data sources.
4. Monitor Microsoft 365 audit logs for Copilot activities involving Excel and Python execution.
5. Evaluate Microsoft Entra Conditional Access policies to restrict Copilot access based on device compliance or location for high-risk data.

Domain: Agentic-AI · Impact: high · Workload: M365 Apps