While on the domain, the PC had Folder Redirection and Offline Files enabled. After it was unjoined, My Documents is empty, but all of the files that were previously synced to My Documents are stuck in the Offline Files Folder. I've attempted to copy them out, but I get an error (Error copying file. Cannot read source file from disk.). I'm guessing this is some kind of permissions issue, but I have no idea where the OFF is actually located on disk.
How do I recover all of these files? Bonus points if you can find a way to preserve the former folder structure too.