Step 3 of the Set up my Office 365 account series.
Add your Office 365 email to the Mail app on your iPhone and iPad. Then you can send, receive, and organize emails.
Note: If Microsoft can't find your account, you might be asked to enter your details manually:
• Email = your Office 365 email address
• Password = your Office 365 email password
• Server = outlook.office365.com (this is required)
• Domain = This can be left empty
• Username = your Office 365 email address