Hi,

In order to match POs and Invoices automatically, posting proposals have to be used. That is the purpose of them. 

If the posting proposals are not used, the matching has to be done manually through the RMB/Command button. 

Thanks for your response. It is really helpful.

One more question. What is the functionality of the field “Automatic Matching at Arrival” in Company > Invoice > PO Matching?

That setting relates to scenarios when a PO is receipted in the supplier invoice entry process:

Thank you so much!!!

Can I please know how to receive a PO through supplier invoice ?