On the device, go to SETTINGS
Click "Mail, Contacts, Calendars"
Select ADD ACCOUNT
Enter your email address (@eagles.usi.edu if student, @usi.edu if Employee)
Enter a good description for the account < click next>
If prompted for any of the following -
Server: m.outlook.com or outlook.office365.com
Domain: leave empty
Username (enter your FULL email address here)
Password: Your MyUSI password
Description "USI email"
SSL - ON select
Next to verify your account.
(May or may not ask for SSL depending on version