Configuration of SCFO for service items

Summary:

Hello,

I have a requirement from a client where two sister BUs do trading of non-inventory items. I'm not very experienced in SCFO, so I want to know what I need to configure so that when a PO is created, a SO is automatically created as well as the invoice. Both companies are sellers and both are buyers.

are there any documents that show such a process?

thank you

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