In what currency will the sales orders be fetched from a marketplace?

The sales orders fetched from a marketplace will have the base currency of your organization in Zoho Inventory.

Note: If Automatic Exchange Rate Feed is not enabled in Zoho Inventory, then the exchange rate will be taken as 1 and applied to the sales order. On the other hand, if the automatic feed is enabled, then the exchange rate on the Sales Order’s creation date will be applied.