Checking customer credit

If you use the credit limit function within QuickBooks, All Orders can provide information on a customer's credit status at order time.     To enable, CHECK 'Check credit limit before saving sales order' in Sales Order Preferences.   

Create an order in the normal fashion, now when you click Save you will get a dialog that looks like the following.

All Orders will deduct the accounts receivable (A/R) balance from the credit limit as well as deduct:

Please note for users of QuickBooks version 2007 or earlier (Enterprise 7 or earlier),  the A/R balance may not get updated during a sync as these version did not allow date filtering on A/R balances.