How remove Outlook from IPhone

Do you want to remove the outlook app? Or an outlook account from the mail application?

For the first option hold the app icon for a few seconds and tap delete. For the second option

1. go to settings
2. tick mail and then accounts
3. Tick on the account that you want to delete
4. then tick remove mail

Tap and hold on the app until you get a list of choices. Choose Remove App.