If you have recently updated or changed your Office 365 handle you will need to manually connect the Office 365 integration of your UpMail account
Here is how:
Open UpMail in Incognito mode (Google Chrome) or InPrivate mode (Microsoft Edge).
- Log into your account and click on the "My Profile" button.
- Select "Delivery Channel" under the Integration settings.
- Disable the current email setup.
- You will now be allowed to connect to a new outlook account.