Allow scheduling of notification settings for make it possible to have two (or more) sets of notifications, preferably with calendar connection.
- normal working hours (set schedule): notifications as they are now (Banner usually turned on for many important events)
- outside working hours / nonworking days: personalizing notifications or just chancing all Banners -> into feed only.
Calendar connection: When marked out of office / busy : disable banners (option to turn this off as per Outlook category).

These settings would be universal, so I would not get notifications to my mobile either when outside working hours. This is different from Quiet Hours: this affects all clients with one setting, instead of Quiet Hours being a single client setting.