From the Home screen on your iPhone:

1. Go to Settings > Accounts & Passwords > Add Account…
2. Select Microsoft Exchange

• Email: Enter your UPN (username@olin.edu)
• Server: outlook.office365.com

This will take you to a login.microsoftonline.com screen which will show your UPN and ask for a password:

• UPN: username@olin.edu
• Password: Your network password

Then select the services you would like to sync. Mail, Contacts, Calendars, and Reminders (Tasks on outlook) all work.