Business Connector Service for sending IDOC to SAP

Hi all,

I have an scenario BC1 -->BC2 --> SAP

The BC1 send an XML file to BC2. I have to transformed the XML file to the IDOC structure ORDERS01and send it to SAP.

Do you know which is the service I have to use for sending the IDOC from BC2 to SAP?. Also, I would like to know how can I use that service.

Thanks in advance.

Pilar.