Summary
- New Outlook for Windows is adding an All Accounts view (Unified Inbox) so users can triage email from multiple connected accounts in one place without merging mailboxes.
- Users will be able to read, delete, search, move, archive, and mark messages across accounts from the unified view.
- The change affects users who have more than one connected account in the new Outlook for Windows.
- No admin action is required right now, but Microsoft says admin controls for enabling or disabling Unified Inbox by default will be added later.
Primary Service: Outlook
Admin Impact: Low
User Impact: Medium
Release Start: 30 Sept 2026
Release End: 31 Oct 2026
Services: Exchange, Outlook
Category: Stay informed
Tags: New Feature, User Adoption
History
10/21/2026 Item Added to Message Center
Microsoft Message
The All Accounts view, also known as Unified Inbox, lets users see email from multiple connected accounts in a single inbox view in the new Outlook for Windows without merging their mailboxes. Each account’s inbox stays separate, and All Accounts view brings messages together so users can triage mail from one place.
Users can read, delete, search, move, archive, and mark messages across accounts without switching between mailboxes. The experience integrates with Copilot for AI-assisted email workflows and supports Search with Copilot for finding messages across the user’s primary account.
Rollout Schedule
General Availability (Worldwide): We began rolling out in late September 2026 and expect to complete by late October 2026.
Impact on Your Organization
- Users with more than one connected account in the new Outlook for Windows will be able to triage email across accounts from a single All Accounts view. This does not merge mailboxes or move messages between accounts.
- Each account remains separate, and All Accounts view provides a unified view only.
Action Required/Recommendations
No admin action is required at this time. New admin controls for Unified Inbox are planned for release later in October 2026. Once available, admins will be able to manage whether Unified Inbox is enabled or disabled by default and whether users can change that setting.
We will provide updated documentation and rollout guidance when the admin controls become available.
Compliance considerations
This feature provides a unified view across connected accounts in the new Outlook for Windows but does not merge mailboxes or move messages between accounts. Review your organization’s Outlook account and automated-assistance policies as appropriate.