Integrating BP in CRM and R/3

Question

Hello Friends,
I have a Customer created in R/3 with BP number 100. I have the same customer created manually in CRM system as BP number 100.
Now I do my middleware settings and do an initial download from R/3 to CRM. I should get an error that BP 100 already exists. Now if I activate my delta will the change in BP in R/3 get reflected in BP in CRM? As there is no GUID logic in R/3 and in KNA1 table the customer is solely identified with it's number will the changes be reflected in CRM?
If possible what is the difference between:
1. replicate BP Master using middleware
2. BP created manually and then middleware settings     done and delta download activated
Regards,
Deba.

Answer 1

Hi Deba,
The mapping customer no. <-> BP Guid is stored in R/3 table CRMKUNNR and in CRM in table CRMM_BUT_CUSTNO. And the assignment between BP no. and BP guid in table BUT000 (in CRM, of course).
Also there is a transaction, /nCRMM_BUPA_MAP where data is retrieved from both tables BUT00 and CRMM_BUT_CUSTNO. to execute it, just enter any of the fields, e.g. R/3 Customer no. 1000 and press enter; you will get the BP guid and BP number. Or you can enter the BP no. instead, and you will get the BP guid and the customer no.
Hope that helps,
patricia