The migration to Office 365 will require a reset of the email on all phones and iPads.
The following videos were created to assist users to update phones and iPad email accounts.
You must delete your current email apps off your phone or iPad before adding the new email app.
Your new email accounts are available now.
Please, watch the video appropriate to your device. It will take you step by step through getting the correct app on your phone or iPad.
https://youtu.be/cR5A2PEqGkE IOS devices
https://youtu.be/8UtzzjC3TBY Android devices