If you want to receive IDoc XML documents using the HTTP protocol, you need the appropriate inbound processing. This inbound processing has been predefined by SAP. To receive IDoc XML documents, you have to activate this inbound processing.
1. Choose the transaction SICF (Maintenance of the HTTP Service Tree).
2. Select the service SAP_IDOC_XML_INBOUND.
3. In the top menu bar, choose Service/Virtual Host ® Activate. The activated service is displayed in black (inactive services are gray).