Hi Nerea,
So, you essentially want to maintain updated exchange rates.
Here are the ways -
1. T500W and TCURF can not be maintained in production. You will have to transport it always.
2. You can not maintain TCURF and TCURR straightaway in production using OB08.
3. You should follow -
a. Transport T500W (if required) and V_TCURF to production
b. Run transaction TBDM to upload exchange rate from flat file
Transaction TBDM updates records in table TCURR. So, please check the information button of the transaction and refer the section Structure for transferring exchange rates (data class 01) to know more about the file structure. You can process the file from your desktop.
I have done that in production recently and it worked perfectly fine.
Thanks
Bodhisattwa