I am aware that on a Windows machine, turning on a OneDrive subscription (or at least an E5 license, is where I'm very specifically talking about), certain folders get moved from c:\users[username] into c:\users[username]\OneDrive. Then OneDrive syncs those locations up to 365.
If you just open cmd (not as admin), it will put you at c:\users[username] and then if you just cd desktop ... yeah, that's empy now. dir in c:\users[username] and I bet you'll find a OneDrive folder.
Of note, the default user folder paths that get changed are \Attachments \Desktop \Documents \Pictures. \Downloads stays at c:\users[username]\downloads