Payment in Functional currency while Invoice/Expense Report is in non-functional currency

Dear AP Community,

We are unable to find a workaround for the following issue:

* User submits expense report (via iexpense) with EURO (Non-functional currency) as a reimbursement currency.

* AP department wants to pay in functional currency, which is AED, but as per system architect we can't pay in AED while invoice/expense report booked in EURO currency.

Kindly assist us how to resolve this issue as AP department don't want to cancel the EURO invoice and reissue it in AED.

NOTE: We have already applied RPC patches in our system

Thanks & Regards

EJ