Starting late May to mid-August 2026, users will automatically see automapped calendars when switching between classic and new Outlook for Windows. This feature is on by default, requires no admin action, and improves calendar access previously unavailable during toggling. Notify users and update documentation accordingly.
Applies to: Microsoft 365 for the web · Microsoft 365 apps
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).