This document will provide you step-by-step instructions on how to filter/sort messages using Outlook for Android.
Outlook for Android provides some options for sorting messages. These include the focused inbox and filters for unread messages, flagged messages, and attachments.
Focused: This is an automatic filter that Microsoft designed to pick out your most important inbox messages. Everything usually in your inbox that is not in the focused inbox will be in Other. If you would like to disable this feature tap the three dots and select settings. Under "Mail" tap the slider next to "Focused Inbox" so that it is grey. Quit the application and restart it to apply your changes.