Trying to set up MS 365 Outlook Email on my iPhone 11

You will have a yourname@outlook.com email address that your 365 account is registered to

Go to Settings, Mail, Accounts, tap on add account

Choose type Outlook.com.

Put in your outlook.com email address, then your password on the next screen.

If you have two factor authentication set up in your 365 account you will receive a code or use your Authenticator app if you have one installed.

But you can use Mail app for an Outlook.com address. I do.

You can also use Outlook app too which comes from the App Store.

Unless your 365 account is different from mine it doesn’t come with iPhone apps. Just the option to use App Store apps like Word and Excel. (Outlook app is free for anyone to use)

PS “Settings, Passwords and accounts” is a setting from an old iOS,

Always use web articles from Support.Apple.com for up to date instructions

https://support.apple.com/en-gb/HT201320

Using Mail app or Outlook app I have never see an advert in my life.

It’s the paid-for Outlook.com address which you get when you pay your 365 subscription that is ad-free.

Good luck.