I have done this before, but I can't remember what I did.
One of our draftsman has a drawing checked out. He wants to get it Released, but they can't because he hasn't checked it back in. Trouble is he can't find which Workspace it's in. I watched him search for it, and he only has about 5 workspaces available to him. None of them have the drawing in it. When I search for it, I can see that it's definitely checked out to him.
How can I find what Workspace it's in? I have Orgadmin privileges. Like I say, I have done this before, but only once, about a year ago. We have 10.2.