New Outlook will support the connection of accounts in special environments, starting with GCC-High and DoD. In this release, all mailboxes connected to New Outlook will need to be hosted in the same special environment. Updates regarding rollout to additional specialized cloud environments will be provided in separate roadmap items as soon as projected timelines are available. #newoutlookforwindows Updated June 5, 2026: We will be tracking GA and Public Preview release of this item in Roadmap ID 564913. We apologize for any inconvenience.
GA date: April CY2026