New Outlook for Windows gets All Accounts unified inbox

Microsoft is rolling out an All Accounts view in the new Outlook for Windows, showing emails from multiple connected accounts in one inbox without merging mailboxes. The feature supports Copilot-assisted workflows and search, with worldwide rollout completing by late October 2026.

• Emails from different accounts appear separately without merging mailboxes
• Users can read, delete, search, move and archive across accounts from one view
• Rollout began in late September and completes by late October 2026
• Admin controls for enabling or disabling the view arrive later in October