Microsoft is adding a Copilot account switcher in the new Outlook for Windows side pane, allowing users with multiple Copilot-enabled accounts to switch accounts within supported experiences. Rollout starts late April 2026, with no impact on single-account users and no required action.
Applies to: Microsoft 365 apps · Microsoft 365 Copilot Chat
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).