Looking for actual supplier invoices - can I access these from the RE platform?
Supplier invoice files, such as PDFs or scanned copies, are not stored directly in Retail Express.
Retail Express can store the supplier invoice number as a reference against the relevant Purchase Order or Stock Receipt, depending on how the stock was received. This allows you to track the invoice reference within the system.
The actual supplier invoice document would need to be stored outside of Retail Express, such as in your accounting system or internal document storage.
If you use cloud document storage to upload supplier invoices, you could also copy the shared file URL and store that link against the Purchase Order in Retail Express for reference.
I am guessing then there is no easy way to match an order in RE to a payment in XERO?