Make it a lot easier with a shell extension. (Can't believe they don't bundle something with the OS yet.) Link Shell Extension works nicely for me, there's others, saves typing it out. Right click whatever directory, "Pick Link Source". Go to where you want to put the link, "Drop as symbolic link" (or junction, hardpoint, etc etc, usually want a symlink) and done. It acts like that directory is physically located in that other directory, when it's really elsewhere. The cloud service should pick up on this new directory that just showed up and go on its merry way. If I recall, if you're using XP symlinks aren't available... but it's been a while.