PO Accounting For Vendor Invoices based on Trans Cur AX2012 R3.

Hi,

In our organisation.

1. Accounting currency,Reporting currency : AED.

2. Account payable parameters. Post Product receipt in Ledger - NO(un checked).

we are getting different accounting in PO Invoice based on the transaction currency.

Note : In both the cases Vendor,Item are same.

Case1: 

Transaction currency for Purchase Order - AED.

In the invoice voucher accounting as below,

a. Credit(-5)  - Vendor balance.

b. Debit(5)    - Purchase, inventory receipt

c.  zero(0)     - Purchase expenditure for product

Case2: 

Transaction currency for Purchase Order - USD.

In the invoice voucher accounting as below,

a. Credit(-5)  - Vendor balance.

b. Debit(5)    - Purchase, inventory receipt

c. Credit(-5)  - Purchase expenditure for product.

c.  Debit(5)   - Purchase expenditure for product.

In case 2 two additional lines are coming for the posting type Purchase expenditure for product.

Is it the default behaviour in AX.

Anyone please explain why the accounting is different in the each case?