My initial setup went fine and the Beam worked as advertised. The setup was temporary while the Pro Wall Set-up was being finished. After mounting the TV, and the Beam along with a DVD Blue Ray the audio playback went from ARC/HDMI to television thru the Beam (and no Dolby & Atmos etc)
Sonos App would not resolve to getting a good CEC (Samsung AnyNet) connection. The steps in the following URL worked: https://en.community.sonos.com/home-theater-228993/enabling-cec-on-your-tv-for-beam-6810049/index1.html#post16251595
My hunch is the BlueRay was hogging the connection....
All steps followed and Bob's your Uncle.