To access SharePoint via a web browser, go to http://cowboymail.okstate.edu, click the App Launcher in the top left, and select “SharePoint”.
Navigate to the SharePoint site that contained the file.
Click “Site Contents” from the navigation menu on the left.
Click “Recycle Bin” near the top right of the page.
Select the file(s) you want to restore by clicking the circle to the left of the file
Click the Restore button at the top of the page.