Looking in the Web Services Ref Help file, for this GetReceivablesCreditMemoByKey method, it shows the return value is the 'GetReceivablesCreditMemoByKeyResult which is of 'ReceivablesCreditMemo' type.
When I run the sample code, it returns a customer ID and a credit memo amount, i.e. this example from the sample company:
Customer Id: ADVANCED0001 Credit memo amount: $465.21
This is what the method is stating it returns, when it mentions it is displaying the credit memo's customer ID and credit memo amount.
Looking for Exchange Rate, I see some references to it for Web Services, but no methods that state anything like GetExchangeRate.... or anything like that.
Being it's not that common of an ask that many users are pulling on transactions, probably explains why we don't have the methods like we do for getting customer lists, or customer addresses, accounts, GL transactions, etc.
Usually we see Web Services more pulling the exchange rate from the transaction already entered.
A GP query or report would be a better option to pull that type of information, based on what I can see.
Others in the Community may have some other options they can share........
Thanks
