RM564609 - Outlook: All Accounts view (Unified Inbox) brings your email into a single inbox view

The All-Accounts view, also known as Unified Inbox, lets you see emails from multiple accounts in a single inbox view in the new Outlook for Windows, without merging your mailboxes. Each account's inbox stays separate; the view brings them together so you can triage in one place. Users can read, delete, move, archive, and mark messages across accounts without switching between mailboxes. The experience integrates with Copilot for AI-assisted email workflows and supports Immersive Search for finding messages across your primary account. Advanced scenarios such as cross-account search and shared mailbox support will follow in later releases.

GA date: August CY2026