The account number of the customer or supplier account. This allows you to group customers or suppliers into a single account or assign a unique account for each customer or supplier.
Restrictions: The account number must follow these rules: It must start with 411 for customers, and 401 for suppliers. It must be between 6 - 15 digits. It can contain both numbers and letters. If the account number is not present, a customer is automatically assigned to account 411001, and a supplier is automatically assigned to account 401001.