Model Relationships to DomainUserManagement

This is where things get tricky. The id and username fields that are required of on a different document. In your CDM context, you can add new documents or edit them and you do this on a different Form. As the required Field that you need to fill is on a different Form you see:

So you need to change this message there is a workaround that involves moving the error field, for example the id on to the current screen of the Form and then hiding it. It looks a bit like this

A12-13297 is still waiting to be planned but progress has been made with Message Display elements in the Content Model (A12-16272) which gives me hope that we could get these elements in the Form to display error messages with bindings.