Although Outlook comes with so many options to manage multiple email accounts, it could be a hassle to manage all of them with ease. It could happen due to some default settings that you may not like.

Change default iPhone and iPad apps under Settings > Apps > Default Apps. Options include browsers, messaging, contactless ...

Your iPhone comes pre-installed with several Apple-built apps. These include Calendar, FaceTime, Reminders, Safari, Notes, Maps, Health, Apple Music, and Mail, to ...