In Outlook, go to your email folder list, and then click Deleted Items.
Important: If you don't see the Deleted Items folder, but instead see the Trash folder, then your account doesn't support recovering an item that's no longer in your Deleted Items folder.
Make sure Home is selected at the top, left-hand corner, and then click Recover Deleted Items From Server.
Important: If Recover Deleted Items From Server isn't there, your account doesn't support recovering an item that's no longer in your Deleted Items folder.
Select the item you want to recover, click Restore Selected Items, and then click OK.