Answered: This endpoint is only available for agreements with an international ledger

Hi Roy

The REST API does not currently support cashbooks for DK and NO agreements.
Swedish agreements use International Ledger and therefore have access to using REST when creating ledger entries through that ledger system.

International Ledger is not available outside Swedish agreements.

To interact with and create cashbook entries for DK and NO agreements you must currently use SOAP and CashBookEntry_CreateFromData / CashBookEntry_CreateFromDataArray