Autodesk offers free downloadable enablers that you can use to access, display, and manipulate object data in applications different from their native environment. This provides essential data accessibility for design teams who create or receive files using Autodesk software. In particular, the AutoCAD Plant 3D object enabler allows Navisworks users to directly retrieve property data while reviewing AutoCAD Plant 3D models.
Navisworks: If you open a drawing that contains external references, properties for AutoCAD Plant 3D objects in external reference drawings may not display. To solve this, delete the NWC file for the external reference, load Navisworks, and open the external reference DWG before opening up the master drawing.