If you add your own enhancement (append) to table BP000 (Treasury Business Partner master data), the field contents of this append are copied to table BUT000 (SAP Business Partner master data), providing BUT000 has an append of the same name with the ‘ZZZ_’ prefix (for example, MIGR to ZZZ_MIGR) and the fields of both appends display the same field names.
If a business partner is designated as an employee, the corresponding role is assigned.
If you do not want to convert individual Treasury business partners to SAP business partners, set the deletion flag for the relevant Treasury business partners and then archive them. Note that the business partners for which the deletion flag has been set but that have not been archived, will still be converted.
See SAP Note 510288 with regard to performance of report RFTBUP01.