Microsoft has updated Outlook Mail & Calendar app on Windows 10 Mobile. The new update that we received in Fast Ring takes the app version to 17.8400.40556.0.
This update brings some UI changes for Outlook Mail & Calendar app. You can now notice some Fluent design elements in the Outlook Mail app on Windows 10 Mobile. Though not all fluent Design elements are still there.
Changes in the Outlook Mail inbox and the search UI are quite easy to notice. UI changes are also there in the calendar app.