Cannot import exchange rates via excel add-in for new currencies with currency code iso '999'. we have reported the issue to MS. BUG number is 921671.

However, we got the comments is the new entity CurrencyNonISOEntity allows import when the exchange rates are for new currencies with currency code ISO '999'. The Excel workbook designer is required to create a new workbook for "open in excel" experience to function properly. need to consider customization.

Do you have possibility to fix the design limitation issue in the future? thanks.