Neither ZoneDirector nor Standalone APs have a complete text configuration file backup/restore capability. You can script some CLI configuration of common settings or WLANs, but not a full backup/restore file.
You can save a configured ZoneDirector backup file, and install it on a new ZD,
leaving that ZD's IP address and login credentials, in order to "clone" another/new
ZD with an existing/working configuration, which is sometimes helpful. This is
done thru the ZoneDirector WebUI too though, not a CLI method.