If you are using rsync to backup to a remote server, you nee rsync installed on both systems.
That’s what nothing I read said for at least the first four hours of trying to get a mac-to-windows rsync backup setup over ssh.
It’s still not working properly, even with rsync installed twice on the Windows machine — one via cygwin, the other via DeltaCopy. I keep ending up with rsync error 127.
The ssh server I’m using on win is Bitvise.
If anyone has experience with this, let me know. I’ll outline how I got it working if that ever happens — I expect it’ll be by installing linux on a vm in Windows, but I’d like it to be simpler than that.