Fix your web browser for phones.
I do not want to add the application to my phone, yet using the web browser on my iPhone is ******* atrocious. Its so buggy. Even just trying to tap my email to open it the side bar opens up to check off the boxes to delete the email. Even just trying to make this message it was irritating. If I didn't have years of emails on this, I would have deleted this outlook account long ago. This is a garbage system.