Sonos doesn't work with Alexa MRM. It can only be added to a devices' group (basically, a room), but not to a MRM group.
Thank you for your posts on this thread and we appreciate the feedback.
We don't currently have any updates on this feature request at this moment in time but we can assure you that we will update the community as soon as we do.
For those of you inclined to do so, it does work perfectly albeit you will need to toggle aux mode on/off.
Nov 12, 2019
Add me to the list of Soundtouch 300 soundbar (+ sub + rears) owners who desperately want the multi-room Amazon Echo feature added to the Bose Soundtouch firmware. PLEASE, PLEASE, PLEASE!!!! Thanks!
Nov 13, 2019
Wow.....how disappointing that I can’t add my new sound bar 500 to the Alexa everywhere group to play music throughout my home and all of my existing Amazon devices...I wish I had known this prior to my purchase.
I was looking to add the 700 sound bar, sub and remote speakers in the upstairs game room; now I have to rethink my strategy.
I love Bose products, but this is an epic fail. I am seriously considering returning it, if a competitor offers multiple room music integration.
Jul 3, 2019
See, that's why I think you'll just better off buying an Echo input and a non smart speaker from Bose. Much cheaper combo with much better functionality. What's the point of getting an speaker with Alexa just to end up using it with echo input to use with other Alexa devices.
And moderator have only one constant answer, no idea.