Credit Limit handling work with a condition that Children Companies will share in Parent Customer's assigned Credit Limit.
SolutionA. Enable the following:
2. Apply Payments Through Top-Level Customers Only Preference
3. Customer Credit Limit Handling Preference
Every time you create a transaction and the Customer exceeded the Credit Limit assigned to the Parent Company, then a warning message will prompt telling that the Customer has already reach the Maximum Credit Limit assigned.