M365 Archive

RM496375 - Outlook: New Outlook Support For GCC-High and DoD

Microsoft 365 Roadmap

Summary

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

Roadmap ID

496375

View in M365 Roadmap

Last Updated

May 11, 2026

Published Jun 12, 2025

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Status

In development

Release

General Availability

Platforms

Desktop

Service

Outlook

Tag

In development
General Availability
GCC High
DoD

Cloud

DoD
GCC High

Description

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

GA date: April CY2026

Version history

2 versions tracked

Updated 1 time since Jan 28, 2026. Microsoft Message Center only ever shows the current version; this archive preserves the history.

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  1. May 11, 2026 · 11:15 PMLatest · v2

    Changed: Tags, Release phase

  2. Jan 28, 2026 · 12:00 AMOriginal · v1

    Changed: Initial version

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