Microsoft Copilot (Microsoft 365): [Copilot Extensibility] Customers can connect M365 Copilot with Dropbox to access and manage cloud files with Copilot Connector

🚨 The Signal: Microsoft 365 Copilot can now connect to Dropbox, allowing users to access and manage files stored in Dropbox via Copilot. This expands Copilot's data access beyond Microsoft 365, increasing the attack surface for sensitive information.

The Impact

Security teams and data owners are affected by increased data exposure risk through Copilot's expanded access to Dropbox content.

• Security teams face new challenges in monitoring data access and preventing exfiltration from Dropbox via Copilot.
• Data owners risk unauthorized disclosure of sensitive Dropbox files if Copilot access is not properly governed.
• Compliance officers must reassess data handling policies to include Copilot's interaction with third-party cloud storage.
• Incident responders may need to expand their scope to include Dropbox logs when investigating Copilot-related incidents.

The Action

1. Review and update data governance policies to explicitly address Copilot's interaction with third-party cloud storage like Dropbox.
2. Implement Conditional Access policies to restrict Copilot Connector usage based on device, location, or user risk.
3. Monitor Microsoft Purview Audit logs for Copilot activities involving Dropbox to detect unusual data access patterns.
4. Educate users on responsible data handling when using Copilot with external services like Dropbox.
5. Evaluate the necessity of the Dropbox Copilot Connector and disable it if not required via the Microsoft 365 admin center.

Domain: Agentic-AI · Impact: high · Workload: Other