The idea is to call the BPM from a BADI or user exit on SAP ECC(via proxy, rfc or ws), then the BPM should sent a Notification with a link to a UI so that the user can approve the document, and finally the BPM should enter the approval back to the ECC(also via proxy, rfc or ws)
As I am new to PO I dont know which approach is better or possible to develop this scenario.
Thanks!
