Log into the Outlook Web App (OWA) via email.osu.edu/owa
Once you're logged in, on the left side you will see all of your folders. Click on the Deleted Items folder. Next, click on Recober items deleted from this folder. It will show the number of items you can recover here as well.
After clicking this, the view will change to show a list of the Recoverable Items
From here, you have several options for restoring emails:
1. Select the email you want to restore and click one of the Restore links. This defaults to sending the email back to the original folder it was deleted from. For example, if you deleted the email from your Inbox folder, the email would show up here after clicking on Restore. To restore the email you want to a specific folder you just need to click and drag the selected email to the folder on the left you want it to be restored to.
2. You can restore multiple emails at once by holding the Shift key on the keyboard while clicking on mutlipe emails. After this you can click on the Restore links to send them back to their original folders, or click and drag on one of the selected emails to send them to a specific folder of your choosing.
3. Right-click on the email you want to restore, and then click Restore. This option like the other restore buttons sends it back to the default folder, so isn't recommended unless you recently deleted it from your Inbox folder.
