>”Wait, what? OneDrive can’t handle Microsoft’s own file types? Sure enough, the official online help says you have to move the offending files to a different folder that OneDrive can’t see” How does something like that ship? That’s going to affect virtually every Office user. Why not just filter out files that won’t sync and warn the user?
C:\Users\Rumpelstiltskin\OneDrive - Rumpelstiltskin's Gold Spinning Services Inc.\
Then you realize that Excel has a 218 character path limit on file names and things get ridiculous really fast.