This is a question that does not need to be answer at this moment but I need to know. Could you import vendor information from QuickBooks?
Vendor information can be exported from Quickbooks and then entered into the Vendor Record template that can be imported into R365 but it does require cleanup to fit the template needs. Additional information for Vendor Records can be found here.
Additionally, we have a great support article that walks you through the steps you need to complete to Export the Vendor List.