As widely reported during the night, Microsoft has been emailing people still using their Band wearables, to announce the end of support for the server-side syncing and management (Microsoft Health Dashboard). Unfortunately, quite a few of the 'smart' functions of the Band do need this server, meaning that after May 2019, any Microsoft Band will be limited to on-accessory fitness-related data display and logging - even syncing to the Microsoft Band UWP app on the phone won't work. If you've been a Band die-hard then note that you can also export all your data from Microsoft Health Dashboard using the tools linked in the FAQ below.

(Never heard of the Microsoft Band? I'm not surprised, it was a short term product, even by Microsoft's standards - here's my Band retrospective.)

Some highlights from the (quite long!) Microsoft FAQ:

Microsoft has announced the end of support for the Microsoft Health Dashboard applications and services. This document contains important dates and information regarding the end of support.

On 5/31/2019, the Microsoft Health Dashboard site will be shut down and Microsoft Band applications will be removed from the Microsoft Store, Google Play, and Apple App store. 

What’s happening to the Microsoft Health Dashboard?

The Microsoft Health Dashboard applications and services are being discontinued and will no longer be available after 5/31/2019. Microsoft Band device users can continue to use their devices, though web connected features will not be available.

Can I transfer my data to another service or wearable?

Users of the Microsoft Health Dashboard will be able to export their data using export tools on the site until 5/31/2019. Instructions for exporting your data are available at https://support.microsoft.com/help/4000335.

Other providers may provide capabilities to help import activity data exported from the Health Dashboard. 

What happens to the Phone app?

The Microsoft Band phone app will no longer work after the Health Dashboard service is disabled. 

Will I still be able to use my Microsoft Band?

Yes, but functionality will be limited to what’s available on the Band device. Capabilities provided by the cloud or the phone app will no longer function. 

Band users will still be able to:

• Record and track daily health information (daily steps, heart rate, basic workouts)
• Record activity data (runs, bike rides, hikes, etc)
• Track sleep
• Set alarms

Note: Resetting the device after the service been discontinued will make it impossible to set up the device again. Only perform this step once you have finished using the Band.

I’d like to delete my data from the Band, how do I do that?

On your Band, tap the Settings Tile , then Power. Then swipe left, tap Reset Device, and tap Yes when asked if you want to erase all data.

Note: Resetting the device after the service been discontinued will make it impossible to set up the device again. Only perform this step once you have finished using the Band.