Our organization is experimenting with migrating from a geometric network to a trace network. We have a dedicated development environment set up, which includes enterprise at the 10.9.1 level. Currently we have an SDE database with a full-blown trace network to play with; branch versioning is set up and a feature service is deployed for editing. The hang up we are encountering is licensing; if we try to edit we encounter the following error.

Now it's our understanding that a user type extension must be assigned for branch editing a trace network in an enterprise deployment. However, we don't understand how to obtain this license and how to deploy/assign? A search online came up dry as well as a search within the MyEsri site. Is this something we have to directly reach out to one of our ESRI representatives about? And if so, is there a cost associated with it?
I know this is baked in with ArcGIS Advanced Editing at the 11.1 level, but we are at the 10.9.1 for the moment.