Maintenance of Rebate Processing 
You can use this function to maintain rebate agreements for trade promotions.
We recommend creating new agreement types and condition type groups.
You do this in Customizing for SAP ERP Central Component (SAP ECC) by choosing:
You need to implement new rebate procedures for trade promotions. You do this in Customizing for SAP ERP Central Component (SAP ECC) by choosing .
Number Assignment Rebate Agreements
You create rebate agreements for trade promotions in SAP CRM and these are replicated in SAP ECC. Although the agreements created in SAP ECC are copies of the agreements created in SAP CRM, their numbers are not identical. If you want the agreements that are replicated in SAP ECC to have the same number:
Ensure that the number range interval used for the internal number assignment for rebate agreements in SAP CRM is identical to the number range interval used for external number assignments for rebate agreements in SAP ECC. You do this:
In Customizing for SAP ECC by choosing
In Customizing for SAP CRM by choosing
In addition, ensure that:
Rebate agreements cannot be created directly in the number range interval used in SAP ECC for the external number assignment for rebate agreements. To do this, create a new number range group in SAP ECC with a new number range interval, both of which have not yet been used.
Table CRMPAROLTP contains the following table entry in SAP ECC. The system, therefore, uses the (external) number that originated in SAP CRM, if data for rebate agreements is to be transferred from SAP CRM to SAP ECC.