Payment method mapping
In ApiCenter, you have the option to include payment method information on the sales order. However since the values of this payment methods are usually not identical in both Applications, this cannot be set by default. In the settings menu, which can be found by Integrations -> SalesOrder flow -> Settings -> General Flow setting.
In this menu a setting can be activated, to map the corresponding payment method data with another Application. Magento 2 in this example. The payment method identifiers for Visma.Net can be found here