Set up an Outlook account on the iOS Mail app
Thanks to Microsoft for their own excelent KB article
Set up an Outlook account on the iOS Mail app | Microsoft Support
Set up a Microsoft 365, Exchange, or Outlook email in the iOS Mail app
Go to your iPhone or iPad’s Settings > scroll down and tap Apps > Mail > Mail Accounts >Add Account.
Select Microsoft Exchange.
Enter your Microsoft 365, Exchange, or Outlook email address and a description of your account. Tap Next.
Tap Sign In.
Note
Tap Configure manually if you need to enter server settings.
Enter the password associated with your email account. Tap Sign in or Next.
The Mail app may request certain permissions. Tap Accept.
Choose the services you want to sync with your iOS device and tap Save. You’re done!
Now you can see your email
