My read of the document is that integrators will run into this going forward. We'll need to cough up the registration email address and the Sonos account password for the system. This will make life miserable for me because customers are rarely present while I install and they wouldn't know their Sonos registration details in any case. Now, I'll need to suspend work until I can track down the customer and straighten this out or make a point of digging this information out in advance.