Office 365 (Outlook for Android) - Recover deleted items
This document will provide you step-by-step instructions on how to recover deleted items using Outlook for Android.
Tap the three lines icon in the top left corner of the screen.
Touch the arrow next to your account address to display mail options. Tap Trash to view your deleted items.
Select the item you would like to recover by touching the item until a check mark appears next to it. Tap the folder icon on the menu that appears, and select the folder you would like to move the message to. The message will no longer be in your Trash and will be stored in the folder you've chosen.