This is the security killer feature. When an engineer publishes an eDrawings file from a CAD program, they can set passwords to control:
With the 3D eDrawings Viewer, you publish a "dumb" solid. The receiver can see the geometry, measure it, and markup it, but they cannot edit the features or extract the design history. It is a secure way to share the shape without giving away the source . 3d edrawings viewer