Microsoft Teams: Information Barriers enforcement for same‑tenant users in external group chats

🚨 The Signal: Microsoft Teams will enforce Information Barrier policies between internal users in external group chats, calls, and meetings. This enhances compliance for regulated organizations by preventing unauthorized internal communication, even when external parties are present.

The Impact

Organizations with Information Barriers configured are affected, reducing the risk of unauthorized internal information sharing in external collaboration scenarios.

• Security Teams: Reduced risk of internal data leakage in external Teams interactions.
• Compliance Officers: Enhanced enforcement of regulatory information segregation policies.
• Internal Users: May experience new communication restrictions in external group chats.
• External Collaborators: No direct impact, but internal user interactions may change.

The Action

1. Review existing Information Barrier policies in Microsoft Purview to confirm desired internal communication restrictions.
2. Communicate the enhanced enforcement of Information Barriers to internal users, especially those involved in external collaboration.
3. Monitor Microsoft Purview compliance reports for any new policy violations related to this enforcement.

Domain: Purview · Impact: medium · Workload: Microsoft Purview