Hi,
I have played with few phone models (e.g. AudioCodes C435HD) and working pretty much as expected.
But with C470HD I end pretty odd issue, I cannot find the following screen from the device:
The guidelines say, that should come from wheel (like it does for others), but the wheel on here:
brings me only a device settings, and "sign-in" goes to company portal.
This device is running "Teams_1.8.303" version, and I wonder if that could be the reason. Even the release notes does not directly say so.
To get higher version is tiny problem as I do not device manager available, and updates from O365 requires the provisioning 
Any others have had similar experiences?
Actually that is not needed for this question anymore. For others yes :)
When you hit your head to the door enough many times, then you perhaps find the correct search terms to use duckduckgo :D I found the following:
Supported versions for Remote Provisioning
Mine is 1.8.303, and does not support that 