How to set up Office 365 Exchange Online email for Android devices using Mail App
This how-to only applies for users who are already migrated to Office 365 Exchange Online (Cloud system).
1. Open Mail App.
2. You can both change the existing RMA Exchange account or remove and add a new one. Details as below screenshot.
3. When it pops up for "Remote security administration", tap OK.
If you require further assistance, please open a support ticket.