If you no longer need the definition of a custom field, you can delete the CFIELD profile that defines it. However, before you remove it, you should delete any occurrences of that keyword in a CSDATA segment of user and group profiles by using the custom field keyword with the NO prefix. Once you delete the CFIELD profile, you cannot use the custom field keyword with the NO prefix for that custom field. Instead, you must delete the entire CSDATA segment using the NOCSDATA keyword when you want to remove field data.