SA Administrator Options - Integrations - Financial Interface Options field descriptions

Interface to Financial Integration: Use this setting to define how the system processes transactions and updates General Ledger. Select one of these values to activate the integration and to enable Distribution SX.e to correspond to the agreed upon structures set up in Lawson. Then, use Distribution SX.e to perform distribution-related tasks, and Lawson to perform financially-related tasks.

You can integrate the General Ledger modules, or combine General Ledger with Accounts Receivable (Customer) and Accounts Payable (Supplier/Vendor). You cannot integrate the AP or AR functions without the GL function. Then, use Distribution SX.e to perform distribution-related tasks, and Lawson to perform financially related tasks.
Caution:
Do not activate the financial integration unless you have properly set up and configured the integration.