Microsoft Teams: Stricter external access controls for federated chats

🚨 The Signal: New PowerShell controls for Microsoft Teams enhance external access restrictions in federated group chats, preventing unapproved external organizations from participating and reducing indirect exposure. Admins gain stricter control over cross-tenant communications.

The Impact

Microsoft Teams administrators are affected, gaining new controls to mitigate the risk of unauthorized external access in federated chats.

• Teams Admins: New PowerShell controls require configuration.
• Security Teams: Enhanced ability to enforce external access policies.
• Organizations: Reduced risk of data exposure to unapproved external entities.
• Users: Federated chat participation will strictly align with policies.

The Action

1. Review existing Microsoft Teams external access and federation policies.
2. Plan for the enablement of 'EnableExternalAccessRestrictionsForChatParticipants' via Set-CsTenantFederationConfiguration cmdlet.
3. Plan for the enablement of 'EnableMutualFederationForChatParticipants' via Set-CsTenantFederationConfiguration cmdlet.
4. Communicate policy changes to users regarding federated chat participation.

Domain: Teams · Impact: high · Workload: Teams