Reorganizing Credit Master Data

Hello

Currently, our company  have credit control area defined at a
franchise level which needs to be changed to Business Unit level.

As per our approach
we will be creating new divisions for all new business unit. For each new
division, we will maintain separate Sales Areas. New credit control area will
be defined for each sales area. Customer will be extended to new sales area.

Question-

1. We would need to know how the open receivables credit control area will be
   re-organized. We have executed F.28 program-RFDKLI20 to re-organize the open
   receivable but the program only picks the default credit control area assigned in
   OB38. But the system does not pick the CCA assigned in OVFL

Can anyone provide the details how
can we re-allign the posted document.