I have a custom billing application (jsp/servlets) running on weblogic that I need to integrate with Peoplesoft over the internet. That is, i need to send invoice created in the in custom application to Peoplesoft. The billing application runs within a firewall (internally). The first approach that comes to my mind is sending an xml invoice to B2B or Integration server, have the Integration translate or transform the xml to peoplesoft format and then have Integration server send it over http to peoplesoft. My question is: what is the best approach of doing this integration? Should I be using the enterprise server as oppose to the integration server to update Peoplesoft.? Has anyone intergrated Peoplesoft, If yes can you share some tips or tutorials .