Outlook: New Outlook Support For GCC-High and DoD

🚨 The Signal: New Outlook for Windows now supports GCC-High and DoD environments. All connected mailboxes must reside within the same specialized cloud environment, impacting secure communication and data handling for government and defense users.

The Impact

Government and defense users are affected, with a low security risk if proper environment segregation is maintained.

• GCC-High users: Can now access New Outlook, ensuring data stays within the secure cloud.
• DoD users: Gain New Outlook functionality, maintaining strict data isolation.
• Security teams: Need to verify client configurations enforce environment segregation.

The Action

1. Review existing client deployment policies for New Outlook in GCC-High/DoD.
2. Communicate New Outlook availability and mailbox restrictions to end-users.
3. Monitor client logs to ensure only same-environment mailboxes are connected.

Domain: M365-Apps · Impact: low · Workload: M365 Apps