Outlook Web Access (OWA) 2016 in Office 365 - Recover Deleted Items
This article explains how to recover deleted items using the Outlook Web Access (OWA) in Office 365.
Restoring Items in OWA
You can recover a deleted folder with all of its messages from OWA as long it is still in your Deleted Items folder. Unfortunately, you cannot recover a folder that has been permanently deleted.
See the following Microsoft Support articles for more information.