Outlook: New Outlook Support For GCC-High and Sovereign Clouds

Originally posted by Microsoft Jun 13, 2025 Uncategorized 0 Comments

New Outlook will support the connection of accounts in special environments such as Microsoft 365 GCC High, Microsoft 365 DoD, and Microsoft 365 operated by 21Vianet (China). In this release, all mailboxes connected to new Outlook will need to be hosted in the same special environment. #newoutlookforwindows

Product	Outlook
Release phase	Preview
Release date	January CY2026
Platform	Desktop
Cloud Instance	GCC High, DoD
Created	2025-06-12
Roadmap ID	496375
Roadmap Link	https://www.microsoft.com/microsoft-365/roadmap?id=496375