In the following example, Lewis Home Furniture is the Buy-from Vendor and CoolWood Technologies is the Pay-to Vendor.

If Buy-from Vendor Value Entry is disabled, value entries created when posting purchases orders for Lewis Home Furniture will use CoolWood Technologies as the Source No.

If Buy-from Vendor Value Entry is enabled, value entries created when posting purchases orders for Lewis Home Furniture will use Lewis Home Furniture as the Source No.