I am new in SAGE 300. My client just upgraded to SAGE 300 2019 version. I want to deploy Web API so I can link it to our E-Procurement system that is PHP based. In summary, the E-Procurement creates Purchase Orders and captures supplier invoices. I want to send the PO and/or Supplier Invoice into SAGE 300.

On my development computer, I have installed Sage3002019Limited. I've googled but can't find setup manuals. How do I proceed from here? I'll appreciate if someone can point me in the right direction.