Intercompany Receivable invoice taking wrong Currency conversion rate type

Summary:

For transfer order across Business units(with different currency) , the intercompany receivable invoice is taking wrong currency conversion rate type.

The financial orchestration flow is setup with correct conversion rate type under documentation & accounting rule assigned to the flow. By looking at the final transfer price , it is clear it is taking Corporate exchange rate type while a different exchange rate type is selected in the Internal transfer flow> documentation &accounting rule.

From where the currency conversion rate is picked up in these transactions? If anyone knows , please share

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