We are connecting an old CRM with a old ECC. They have different customer databases. Many customers are equal in both system.
There is any way to map these customers to integrate the systems, CRM and ECC?
Thank you and sorry for my english.
First of all business has to decide the system of record for business partner (customer) master data - ECC or CRM? CRM database is having more fields to capture the detailed information of the business partner compare to ECC. SAP recommands to use CRM as systems of record for business partner.
Data (Master & Transactional) between ECC<>CRM is synchronize via middleware. If you are loading the data for the first time - you have to perform initial load (Master Data) and delta loads (Transactional Data) periodically.
ECC<>CRM business partner data needs to be in synch (same - via middleware), if you want to use ECC fucntionality - such as delivery or billing processes.
There are simple/complex steps needs to be carried out (t-code: PIDE) to map the ECC Customer with CRM Business Partners via middleware. Number rannges needs to be maintained properly.
Please find the following links (CRM 4.0), that will help you to understand business partner in depth :
help.sap.com - Business Partner
SAP building blocks to replicate the data between ECC<>CRM
check : a) C03 : CRM Master & Transactional Data Replication
b) C10 : CRM Central Master Data
If you have any further questions, let me know....
Reward me points, if the above information helps you....