Being able to keep files in two locations synchronized is useful for backing up, sharing files, and staying organized. The Windows robocopy command lets you perform file copy and synchronization ...

Robocopy (Robust File Copy) Robocopy is a powerful command-line tool built into Windows that offers advanced features for copying files, making it ideal for large-scale file transfers.

Robocopy on both the SAMBA wiki and Raymond Chen himself say they support server side copy. Trouble is, it doesn't seem to.