As of yesterday #Microsoft's #DRM server is gone. If you have any ebooks through their store . . . bid them adieu ¯\_(ツ)_/¯
Users will be given refunds but the books themselves will no longer be readable. If you made notes on the titles, you'll get $25 credit as a, "we're sorry you'll no longer have access to the notes you took on all those books. Here's $25 and we'll call it even!"
#DefectiveByDesign is a campaign run by the #FSF to combat Digital Restrictions Management and they work to prevent this exact kind of thing from happening.