Microsoft has announced (non-Javascript version) (emphasis in original) that
As of November 15, 2015, Zune services will be retired. You will no longer be able to stream or download content to your device from the Zune music service. However, Zune devices will still function as music players and any MP3 content that you own on the Zune device will remain there. You'll also be able to transfer music to and from your Zune player.
Note Content that was purchased with DRM may not play if the license can't be renewed.
Existing Zune Music Pass subscriptions will be converted to Groove Music Pass subscriptions.
Analysis:
(Score: 4, Insightful) by davester666 on Saturday October 31 2015, @10:31PM
Well, you did know when you purchased the music that:
1) the downloaded files had DRM that needed to be validated against Microsoft's servers
2) the terms that you licensed the files under included a term indicating that these servers could stop working, either temporarily or permanently, with no recompense to you
So, basically, Microsoft has done to you exactly what they told you they were going to do, and you are only now going "but I don't want that pole shoved up my ass."
Too late. Take it like you deserve it. You do.