Outlook (Web App) - How to Recover Deleted Email
By default, deleted emails usually show up in the "Deleted Items" folder of Outlook. If an email is permanently deleted from that location, there is a small window where it is still possible to recover it from Microsoft's servers. At the time of this writing, permanently deleted items are still recoverable for a period of 14 days. The process for recovering these emails via your browser is as follows:
Process for recovering emails that were permanently deleted from Microsoft Outlook (Web App).
1) After opening your browser and logging in to the Outlook web app, select the Deleted Items folder from the left-hand column.
2) Click on Recover deleted items. This might open a new tab or window.
3) Find your email in this list of deleted emails. Check the box that appears when hovering your cursor over the left-hand side of the email you wish to recover. Then click Recover.
4) A dialog box will open asking you to confirm the recovery and direct you to where the recovered item will appear. Click OK.
Your recovered email should now appear in your inbox. If the message is older, you may have scroll down in your inbox to find it, or run a search for it.