The tech support group confirmed that the attribute assistant does not work with the parcel fabric feature dataset. It would be nice to be able to populate other fields in the polygon feature class of the parcel fabric based on the "name" field.
Hey I know you posted this a few years ago. Were you able to get Attribute Assistant to work for you with parcel fabric, and custom fields? We have been using Fabric now for about a year, and would like to start automating some of the attributes.