This is a post about the behavior of a customer posting profiles for a customer group after changing the customer group of All customers.

If change the Customer group of All customers and then create a credit note for a Sales order that was created before the Customer group was changed, the Ledger account for the credit note will be posted in the current Customer group's The Ledger account of the credit note will be posted to the Ledger account of the current Customer group.

Therefore, there will be a difference between the Ledger account of the Sales order that was posted before the Customer group was changed and the Ledger account of the Sales order that was posted with the credit note after the Customer group was changed.

Even if the Customer group is changed, the Ledger account of the original sales order must be transferred to the credit note.