Microsoft Copilot (Microsoft 365): Copilot Chat - Teams chats in ContextIQ

🚨 The Signal: Copilot Chat can now search and use content from Microsoft Teams chats via ContextIQ. This expands Copilot's data access, increasing the risk of sensitive information exposure if not properly governed.

The Impact

All users are affected, increasing the risk of inadvertent data exposure through Copilot's expanded access to Teams chat content.

  • End users: Risk of oversharing sensitive data in Copilot prompts.
  • Security teams: Increased surface area for data leakage and compliance breaches.
  • Data owners: Need to re-evaluate data classification and access policies for Teams chats.
  • Compliance officers: Potential for non-compliance with data handling regulations.

The Action

  1. Review and reinforce Microsoft Purview Data Loss Prevention (DLP) policies for Teams chats.
  2. Educate users on responsible prompting and data handling within Copilot Chat.
  3. Audit existing sensitivity labels applied to Teams chats and channels.
  4. Assess Copilot access policies in Microsoft 365 admin center for least privilege.
  5. Monitor Copilot usage logs for unusual data access patterns.

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