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 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.

Last Updated

Jun 5, 2026

Published Jun 12, 2025

View version history

Status

Cancelled

Release

General Availability

Platforms

Desktop

Service

Outlook

Tag

Cancelled
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 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

Version history

3 versions tracked

Updated 2 times since Jan 28, 2026. Microsoft Message Center only ever shows the current version; this archive preserves the history.

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  1. Jun 5, 2026 · 10:00 PMLatest · v3

    Changed: Body, Tags, Status

  2. May 11, 2026 · 11:15 PMv2

    Changed: Tags, Release phase

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

    Changed: Initial version