If you have access to Managed Suppliers accounts, there is a setting you can update on the supplier account you can enable or disable to allow suppliers to change from EDI to portal. To update the settings follow the steps below.
Go to Admin Cogs
icon.Click Manage Suppliers.
Search for the relevant account.
Click the View supplier details
icon.
Under the Order Mgt tab, scroll to find Can Change Orders to EDI/ paper invoices to Portal invoices.
Tick the box to allow supplier to change Change Orders to EDI Portal or
Untick the box to not allow them to be able to switch.
Click Save.