Usually exchange rate type M is standard delivery to apply for import procurement. For Thailand business requirement, the exchange rate has to derive from Bank of Thailand selling rate based on bill of lading date so system should realize the desired exchange rate type mentioned for companies under Thailand while the others still refers to standard setting.
During invoice receipt, selling exchange rate will be determined from posting date in case no entering of specific exchange rate. Meanwhile there is potential that user can enter exchange rate manually, the routine should not overwrite entered exchange rate too. Below are the steps to proceed:-