Reminder to establish rsync connection from a windows server to a remote server
install cwrsync Or CYGWING
Use this link for CWRSYNC
Or install Cygwin and select RSYNC, SSH et openSSL package
Setup a DOS script:
C: cd c:/Program Files (x86)/cwRsync/bin rsync.exe -aivz --rsh="./ssh.exe -i C:/Users/bob/.ssh/id_rsa -p 8888" "/windows/backup/" "email@example.com:/var/backup"
the rsh command allow you to customize the connection particularly to change the default port (the -p option) and to point the right identity file (private rsa key) (the -i option)
for basic explanations please refer to rsync.net