what guidance do ya'll provide to the team who is attempting to Unapply Vendor Credits when both the credit & bill are in closed periods?

Unapplying vendor credits is not considered as a GL impacting change. So if a role has the Allow Non-GL Changes permission and the subject posting period has that turned on as well in the Period record, then that role should be able to unallocate vendor credits.

@Luis it is impacting when you have different fx rates on bill and credit, because it create a currency revaluation transaction.

let me dig a little further - i wonder if it's a permission issue