3180185 - What is the difference between "Resend to Supplier" & "Send Orders to SAP Business Network"? And when can I use them?

I can see that Ariba has two options, one on the Order that says "Resend to Supplier", while the other is one is found on Manage -> Purchase Orders, the button is under the search results and says "Send Orders to SAP Business Network".

• What's the difference between these two buttons in terms of functionality?
• What do they actually do?
• When to use them?

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