ISU BP replication from ISU to SD customer

Hi dear experts, the BP replication from ISU to SD works correctly for creation/modification and an ISU BP is automatically replicated as SD customer, however recently we had a new requirement to stop using the address dependent communication area (dependent: telephone, Fax, email) and start to use the independent communication area where we also have telephone, fax and email. In this moment only the dependent address data is replicated in SD, but the independent is not.

Question 1: Is it possible to choose what are the fields that we want to update from the BP ISU to the SD customer?

Question 2: is there any badi, BTE that i could use to accomplish this?

Thanks to all fro the clarification of this topic,

Best Regards

Joao Abrantes