New Exchange Rate not updating sales lines

Hi all, not sure if this is a bug in standard navision GB 4.00, but if you enter a sales order in a foriegn currency then change the posting date on the sales header which falls within a new currency exchange rate, although the system prompts you if you wish to update the exchange rate the existing sales line prices remain the same, but if you enter a new sales line onto the order then it picks up the new exchange rate. Can anyone clarify if this is how it is supposed to function? Any help is much appreciated, thanks - Mike.

Hi Mike, 

It's quite some time ago since you posted this question, but your post still stand as open. Have you found an answer or solved your problem?

If yes, then I would hope that you would share the solution with the rest of the user group as I think many members would get value from the answer, so that we can close the topic and mark it as Answered.

If no, then maybe you can add a bit more information to the question, so that other members maybe are able to answer your question.

Thank you.

Did you change the date(s) on existing Sales Lines, too? Otherwise date(s) change only in Header, Lines remain the same & there is nothing to recalculate...