Activate the interface on the Administration tab. Select a Company, then go to the FA tab.
Enter the Revenue accounts for specific types of revenue.
Tick Auto-assign external customer number with the first invoice if you want to assign accounts receivable automatically.
To increment the external numbers, click on the button Increment ext. no. and enter the number before the first external number you want to assign. Example: "0019" if the first customer is to receive the number "0020".
Enter an FA directory for the financial accounting export and adjust the settings for your FA system.