According to the API documentation, we should be able to send a PUT request to an individual order to update it.
The API currently returns an error 404 Not Found, with the message:
[
{ "message": "Action ApiV6OutboundOrdersController::edit() could not be found." }
]
We tried to get around this by sending a DELETE request followed by a POST request, but it looks like DELETE is not implemented in the API either
Deletion of SO's was recently implemented: https://api-docs.cartoncloud.com/#delete-outbound-order