The following instructions step through the process of configuring your Office 365 email account in the Outlook for Apple iOS app.
*Note: The screenshots for this tutorial are taken using an iPhone, but the steps are identical for iPad.
To get started, download the Outlook for iOS app from the Apple App Store. The first time you use the app, it will bring up the Add Account page automatically. Enter your CULoginName@colorado.edu in the Email field (not firstname.lastname@example.org), then tap Add Account.