Please refer to the steps below on how to set up your email account on your iPhone.
1. Download Outlook App in App Store. https://apps.apple.com/sg/app/microsoft-outlook/id951937596
2. From the Home screen, select the Outlook app icon
3. Enter email address then tap Add Account
4. Tap "IMAP" under "Advanced"
5. Enter your Email Address, Display Name
6. Now enter the following for both Incoming and outgoing server settings
7. Now Tap Sign In
8. Tap Next
9. for the diagnostic and usage data you may wish to accept or decline this part
10. Tap continue to outlook
11. Tap Maybe Later if are doing the setup for 1 email account only
12. Now you have successfully done the email setup.