1. Click on Settings
2. Click on Accounts and Passwords or Mail
3. Add Account
4. Exchange
5. Enter your Email address, Password, and a short description if you’d like
6. Tap Next in the top Right Corner
7. Enter in the following information on the next screen
Server-Outlook.Office365.com
Domain-Leave Blank
Username-Your Full Email Address
8. Tap Next, and then Click Save