Correct! All kit series except the new Room Bar works as expected with the ADD button, to add an Audio only call to an existing video call. In our environment this goes out via CUCM voice clusters. When registered On Prem, as all other production dev...

That is what I would expect about awareness on other devices.. It does accept a random generated psswd which has a minimum of 8 characters  - perhaps the issue is using less than 8 even though there is No min set on codec?