RFC connection - SAP CRM to SAP R/3

Question

Hello all,
              We have a requirement in the project, where client is already using SAP R/3 ERP system, and is going for CRM for e-commerce. Now as they have most of the development already done in R/3, they want to use some Function Module or say Report Program already developed in R/3 to be used in CRM system.
Please tell, if this thing is possible via RFC connection, and if yes, then how can we go about doing it? It is a critical requirement.
Thanks in advance,
Rohit Khetarpal

Answer 1

In transaction sm59 define an rfc destination in CRM that connects back to R/3.
You most likely already have one for bdocs etc. You can use this one or create one specific to your task.
Create an RFC user in R/3 that will have sufficent authorization to run your remote enabled function modules in R/3. Assign the user to your new CRM rfc destination in sm59 if you've created a new rfc destination.
Make sure the remote enabled check box in your R/3 function modlule attributes are ticked.
In your CRM program call the R/3 function module with the name of the rfc destination you created, as below.
call function ' my_r3_function_module_name' destination 'the_rfc_destination_name'.
You will need to add in the fm interface manually, i.e. importing, exporting, etc.