In this article, we'll explain how to set up an Office 365 email account on your iPhone or iPad for the first time under iOS 10.
Tap Settings on the home screen of your iPhone or iPad.
To open the email settings, tap Mail.
Tap Accounts, then Add Account.
Select Exchange from the menu to start setting up the email account.
Enter the email address for your account, the password and a description.
To verify the account settings, tap Next. Save the account settings, then close.
The email account is ready. You can now send and receive emails.