Microsoft Teams: Screen & Window Sharing on Mac via macOS native experience

🚨 The Signal: Mac Teams users can now share screens using macOS native features. This user opt-in change could expose sensitive data if not managed, impacting data loss prevention and monitoring capabilities.

The Impact

Mac users are affected, with a potential risk of sensitive data exposure during screen sharing.

• End users: May inadvertently share sensitive data if not trained on new sharing controls.
• Security team: Increased risk of data exfiltration and reduced visibility into shared content.
• Admins: Need to review and potentially update existing data loss prevention (DLP) policies for Teams on macOS.

The Action

1. Review existing Microsoft Purview DLP policies for Teams to ensure they cover macOS screen sharing scenarios.
2. Communicate best practices for screen sharing sensitive information to Mac Teams users.
3. Monitor Teams usage reports for unusual screen sharing activity from macOS devices.
4. Consider implementing or refining Conditional Access policies for macOS devices accessing Teams.

Domain: Teams · Impact: medium · Workload: Teams