Use the ICIClientSettings interface GetAllowMODEZ method to determine if "Allow MODE Z" is enabled for the Site. Refer to User FTP Security Settings for an illustration of how this and other Client Settings Interface Methods and Properties can be accessed in the Administrator interface.
You may also pass in an optional BOOLEAN variable as a parameter to this function; when the function returns this optional parameter contains the INHERITED status of this feature (true means inherited from server; false means set locally at the site level).
Signature:
HRESULT GetAllowMODEZ([out, optional] VARIANT_BOOL *pInherited, [out, retval] VARIANT_BOOL *pVal);