Microsoft Teams: Event Chat now available for Events optimized for a large audience in GCC, GCC High and DoD

🚨 The Signal: Microsoft Teams now enables public chat for large events in GCC clouds. This expands communication but introduces new vectors for information leakage and unmoderated content, requiring review of existing event policies.

The Impact

Event organizers and security teams are affected by new unmoderated chat, risking data exposure and compliance issues.

• Event Organizers: Risk of unmoderated content and policy violations in public chat.
• Security Teams: Increased surface area for data leakage and malicious content.
• Compliance Officers: New channel for potential non-compliance with data retention rules.
• End Users: Potential exposure to inappropriate content or targeted attacks.

The Action

1. Review and update existing Microsoft Teams meeting policies for large events to address public chat.
2. Configure 'Chat in meetings' settings within Teams Admin Center (Meetings > Meeting policies > Global (Org-wide default) or custom policy).
3. Educate event organizers on chat moderation tools and best practices for large events.
4. Implement or reinforce data loss prevention (DLP) policies for Teams chat to monitor sensitive information.

Domain: Teams · Impact: high · Workload: Teams