Microsoft Copilot (Microsoft 365): [Copilot Extensibility] Simplified People Resolution for Custom Copilot Connectors

🚨 The Signal: Copilot connectors can now map external user identities to Microsoft Entra ID, simplifying integration but requiring careful identity governance to prevent data exposure and ensure accurate access controls.

The Impact

Developers and security teams are affected by the potential for misconfigured identity mappings, leading to incorrect data attribution and unauthorised access within Copilot.

  • Developers: Simplified integration could lead to overlooking security implications of identity mapping.
  • Security Teams: New identity resolution methods require validation to ensure correct access and data attribution.
  • Data Owners: Risk of data being incorrectly associated with users, leading to privacy and access control issues.
  • Auditors: Increased complexity in verifying identity and access management controls for Copilot data.

The Action

  1. Review and update existing Copilot connector development guidelines to include secure identity mapping practices.
  2. Implement a robust testing framework for all custom Copilot connectors to validate identity resolution accuracy.
  3. Establish a formal approval process for new Copilot connectors, including a security review of identity mapping configurations.
  4. Monitor Copilot usage logs for unusual access patterns or data attribution discrepancies related to custom connectors.
  5. Educate developers on the security implications of identity mapping and the importance of least privilege principles in connector design.

Domain: Agentic-AI · Impact: high · Workload: Other · Essential Eight: Restrict Administrative Privileges, Multi-Factor Authentication · ISM: ISM-0109, ISM-0123, ISM-0140, ISM-0445, ISM-0974, ISM-1173, ISM-1175, ISM-1228, ISM-1380, ISM-1401, ISM-1504, ISM-1505, ISM-1507, ISM-1508, ISM-1509, ISM-1647, ISM-1648, ISM-1650, ISM-1679, ISM-1680, ISM-1681, ISM-1682, ISM-1683, ISM-1686, ISM-1688, ISM-1689, ISM-1815, ISM-1819, ISM-1872, ISM-1873, ISM-1874, ISM-1883, ISM-1892, ISM-1893, ISM-1894, ISM-1897, ISM-1898, ISM-1906, ISM-1907