While creation of Purchase req /Purchase Orders, Supplier site is not populating for any Supplier and in the Supply base form- it's showing as no Supplier is attached to the Operating unit.
I've set the MO:Security profile,created Org parameters,Financial options but still the issue persists
Go to PO Superuser or similar responsibility.
Search for your supplier
Click on the "Address" book" link on the left side bar.
Click on the "Manage Sites" icon for the respective address.
Check the "Pay" checkbox in the "Uses" tab.
Save the record.