Ready for the first test with:
#!/bin/sh
## ibays ##
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=username@domain:group@domain /var/lib/nethserver/ibay/IBAY-1/ root@targetip:/var/lib/nethserver/ibay/IBAY-1/
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=username@domain:group@domain /var/lib/nethserver/ibay/IBAY-2/ root@targetip:/var/lib/nethserver/ibay/IBAY-2/
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=username@domain:group@domain /var/lib/nethserver/ibay/IBAY-3/ root@targetip:/var/lib/nethserver/ibay/IBAY-3/
## home ##
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=username-1@domain:group@domain:domain users@domain /var/lib/nethserver/home/username-1/ root@targetip:/var/lib/nethserver/home/username-1/
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=username-2@domain:group@domain:domain users@domain /var/lib/nethserver/home/username-2/ root@targetip:/var/lib/nethserver/home/username-2/
## mails ##
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=vmail:vmail /var/lib/nethserver/vmail/username-1@domain/Maildir/ root@targetip:/var/lib/nethserver/vmail/musername-1@domain/Maildir/
rsync -avzr -e "ssh -p portnumber" --delete --progress --chown=vmail:vmail /var/lib/nethserver/vmail/username-1@domain/Maildir/ root@targetip:/var/lib/nethserver/vmail/username-2@domain/Maildir/
exit 0