Communicator app enters Public Preview

🚨 The Signal: A new Microsoft Teams app, 'Communicator,' enables targeted organizational announcements with acknowledgment tracking. This introduces a new communication vector within Teams, requiring careful access control and content governance to prevent misuse and ensure compliance.

The Impact

Teams administrators and designated communicators are affected, with a security risk related to unauthorized communication and potential information spillage if not properly controlled.

• Teams administrators: Must configure access and policies for the new app, risking unauthorized communication if misconfigured.
• Designated communicators: Gain a powerful communication tool, but risk misuse or non-compliant messaging without clear guidelines.
• Users and Teams channels: Receive official communications, risking information overload or phishing if the source is not clearly identifiable.
• Security teams: Need to monitor for potential abuse or unauthorized information dissemination via this new channel.

The Action

1. Review Microsoft Teams app governance policies to control Communicator app availability and usage.
2. Define and implement a clear policy for designating Communicator app users and their permissions.
3. Establish content guidelines and approval workflows for messages sent via the Communicator app.
4. Educate designated communicators on responsible use and compliance requirements for official communications.
5. Monitor Communicator app usage and reporting for any anomalous activity or policy violations.

Domain: Teams · Impact: medium · Workload: Teams