The replication of Business Partner Master Data uses the Middleware functionality, here is path to that Help area:
SAP Customer Relationship Management -> Master Data Business Partners -> CRM Integration Services.
Go to the section 'Controlling the Message Flow and Error Handling' for valuable information on BDocs.
The following Blog goes through the various system settings required for BP data transfer to work correctly:
Sometimes it is necessary to stop an initial load before it completes, for information on how to do this, see the following:
Similarly, you may wish to stop the delta download from ERP to CRM, here's how to do this:
It is possible to filter the data being transferred between ERP and CRM and vice versa. To filter the data download (ERP to CRM), filters are set on the download objects in transactions R3AC1/R3AC3/R3AC5.
To filter the data upload, that is data sent from CRM to ECC, please see the following:
http://scn.sap.com/docs/DOC-44229
Often, the best and only way to resolve a data replication issue is by debugging the queues, this is a very useful blog on how to debug the customer delta download from ECC to CRM:
This is a useful wiki regarding BDoc error R11126 that can be issued during BP replication:
http://wiki.sdn.sap.com/wiki/x/CQGbE
Here is a list of commonly recommended notes in CRM-MD-BP-IF:
757955 Configuration of CRMC_BUT_CALL_FU - This note contains a list of all the standard function modules that must be active in order to guarantee correct replication of BP data between the CRM and ERP system. The note is valid for CRM release 500 and all releases above this.
777965 Flow debugging information through queues
609766 Correction of BP GUIDS in CRMM_BUT_CUSTNO, BUT000 - This note contains a report to correct inconsistencies between CRM and ERP in the customer tables as listed. The errors normally appears as mapping errors in the BDocs (transaction SMW01).
765236 FAQ: Queuing in CRM and R/3
429423 CRM Release: General Analysis of the initial load
1541354 - Error message "Fill in all required entry fields" (Error Message no. 00055)
1528369 - How to solve Business Partner / Customer exchange (CRM<--> ECC) replication issues
1632952 Errors in BP to BP payment card replication
1654097 Request load of BP from ERP to CRM throws CCard error R1561
997586 FAQ - Common questions asked about Vendor Management