Download the Outlook Mobile for iOS app.
Launch Outlook Mobile. You may be prompted for an email address. If not, tap Settings >> Add Account >> Add Email Account.
On the Add Email Account page, type your Xavier email address and then tap Add Account.
If asked to select an "email provider", tap Office 365.
You will be redirected to a Xavier University login screen. Enter your Xavier credentials in the spaces provided, and click Sign In.
Select Yes to let the app access your info, if prompted. Outlook for iOS will begin syncing.
If you previously were using iOS Mail app to check your Xavier email, you should turn off its mail-checking ability for that account.