Hi @Timmermans Roel
I had a look too in 24R1 version and, yes the same behaviour was observed.
However, it seems to be the intended functionality. I tested this functionality and if you have not entered any value here, the default document address will anyway get fetched into the customer order that is created from the generated invoice plan lines. So this field is empty means, anyway the default document address is fetched.
But if you want to use a different address other than the default one, then you need to add that address in the service contract, invoicing tab.
The help text says:
The identity for the customer's document address to which documents will be sent. When you enter a value for this field that would be selected as the document address for the customer orders created for periodic invoicing. When this field is empty, the default document address for the customer would be automatically selected for the customer order. Note that, this field is not related to the customer orders created for work orders connected to this service contract.
Hope this explanation helps.
Best Regards,
Thilini