A previous update let you share activity summaries through the Menlo Park social media site, Twitter and in email or text messages.
Now the Health app will let you connect your Facebook account to see who else is using Band to get fit. From there, you'll be able to go up against friends with Social Challenge for most steps and calories burned, longest bike ride and more where challenges can last one, three, five or seven days.
Microsoft Health's Leaderboard lets you compare your standing and check your friends' daily activity.
You're probably thinking this is just a way for Microsoft to hawk its wearable, but you can actually still participate by using the Microsoft Health app, through your iOS, Android or Windows Phone. It will only count steps or calories burned but you won't need the Band.
Fitbit and Jawbone have similar leaderboards successfully integrated in their apps, so it's great to see Microsoft jumping on board.
While we've not exactly been the biggest fans of Microsoft's fitness trackers, it is good to see that the Redmond company is investing time in improving the software and adding new features on a regular basis.
The new features will be rolling out today into next week so look out for the update and let us know what you think when you give them a try.