We are currently developing a zoho sign API feature to replace the standard extension as the mapping of custom fields has to be done each time we create a new sales order.

However, whilst we can create the document all ok, we don't seem to be able to find how we can update the document status on the sales order page (as the standard extension does) and also upload the completion certificate and the completed signed PDF to the sales order page also.

We don't want to try and create a new way of doing this as the standard extension has this great functionality that we really appreciate.