Hi Ahmet,
You have to reach out to MS if you want to enable this feature.
There is not much information provided apart from what is stated in the feature management notes:
This feature changes the accounting practice for inventory related events in regards to reporting currency in General ledger. In this feature, a selected set of scenarios are supported.
Historically inventory events has been accounted in the sequence
Transaction currency -> Accounting currency -> Reporting currency
By applying this feature the sequence change so inventory events are being accounted.
Transaction currency -> Accounting currency
Transaction currency -> Reporting currency
This is achieved by introducing a triangulation from Accounting currency to Transactions currency which is used to compute Reporting currency amount on inventory events.
In addition the offset postings of accruals occurring as part of invoice will now use the original exchange rate applied and the spot rate.
The best thing is to contact MS if you urgently need this feature.
Best regards,
Ludwig