https://www.theverge.com/2018/5/31/17413620/microsoft-groove-music-ios-android-end-of-life-support

Microsoft retired its Groove Music streaming service last year, but promised to keep investing in the app for Windows 10 users. That investment won’t continue for iOS and Android users, though. “Tomorrow we’re notifying customers that on December 1, 2018, the Groove Music iOS and Android apps will also be retired and, effective June 1, are no longer available for download,” says a Microsoft spokesperson in a statement to The Verge.

The app removal means you’ll no longer be able to use Groove Music as a locker service to access MP3s or other audio files from Microsoft’s OneDrive cloud service. However, Microsoft says music files will “continue to be available and playable on OneDrive” and other apps can access them. That’s not the same type of experience (with album art and music controls) that Groove Music users have come to expect, but Microsoft has obviously given up on offering a music app across major mobile platforms.