Progress...
I have found this reg edit...
HKCU\Software\Microsoft\Inbox\Settings\SMSAvailabl e = 0
This reg accomplishes the disabling of the notification icon in the top bar & the notification bubble and also allows manilla to clear it's notificaton when checked via the messages tab which is what i'm looking for but not quite there...
In adition it also disables the sound notificaion (even if still set to play in the "Sounds & Notifications" settings) and disables threaded text
I tried to do the threaded text reg after and it did not re-enable threaded text.
Keep the ideas comming if you have any