Can't get Outlook email on your iPhone?
You can do one of two things to resolve this issue.
You can either download the Outlook app from the App store and set up your Marymount account through the Outlook app.
Or
You can go into your phone settings and remove the Marymount email account and then re-add it to your phone. When you are re-adding the account to your phone, just Make sure you select the Microsoft Exchange option for account type