Activate Data Separation for service provider customers

Hi experts,

I try to implement in SPRO "SAP Solution Manager Implementation Guide" -> "SAP Solution Manager" -> "SAP Partner" -> "Service provider" -> "Work Centers for Service Provider Customers" -> "Activate Data Separation"

I can not get successful results. It seems to me the function does not work correct.

I can not understand how business partner can be assigned to customer number according to

"

You have set up job REFRESH_ADMIN_DATA_FROM_SUPPORT using the basic configuration so that customer business partners are assigned the additional external identifier of type SP1001.

Data separation according to criteria other than the SAP customer number is currently not supported."

I found no additinal information about it.

Regards, Evgeniy