Ftp – How enable FXP (server to server transfer) in Windows Server (IIS FTP)

You don't. rsync can't do that for you, it is a protocol of its own and doesn't work over FTP.

You might, however, want to try csync. IIRC it provides rsync-like behaviour over HTTP. I can't comment on whether it works over FTP, you'll have to try it.

Couple of questions to help troubleshoot.

1) Can you ping the FTP server from the other server? 2) Have you attempted to telnet to port 21 from the second server to the FTP server? If so, what is the result? 3) If you turn off directory security temporarily does that allow you to contact the FTP server? 4) Are you running Windows Firewall (Routing and Remote Access)? 5) Are there any errors in the Event Log?