Notifications settings should be similar to accessing Office 365 online. The only notifications options I get within OWA is to turn ON/OFF Calendar reminders. No option to turn ON/OFF emails for instance. So when I'm at work and receiving all my emails on my desktop, I only need notifications for calendar reminders/events. I don't need to see an email come into my outlook app on my desktop and then my phone beeps 2 seconds later, for every single email that comes in. I can always turn ON email notifications on weekends or at night if I want them.