Office 365 (Outlook Mobile App) - Turn "Organize by Thread" Off
An issue has recently come to light that is related to a default view setting in the Outlook mobile app. It defaults to organizing email by thread which arranges messages as conversational threads based on the Subject of the message. While some users find this feature convenient, others find it difficult to locate and respond to certain emails quickly as it collapses the content within a conversation thread. As a result, some students and faculty have missed important messages related to class content and exams. Users have the option to change this view setting if they wish.
2. Select the Settings icon.
3. Scroll down to Organize mail by thread, then tap the button to toggle the setting (when turned off, the button will be grayed out as pictured below).