The company says more than 500,000 organizations are now using Teams, including 91 percent of Fortune 100 companies. That might seem surprising if your life is ruled by Slack, but it's a reminder of just how young this arena is -- there's still plenty of room for competition. Microsoft says that a big reason large companies opt for Teams is that it's a part of their existing Office 365 subscription. If you're already paying for that, why would you pay more for Slack? Fittingly, Microsoft also announced today that the entire company -- all 180,000 employees -- has finally moved to Teams from Skype for Business.

Now to those new features: Custom backgrounds is an extension of the blurred background feature Microsoft brought to Teams and Skype earlier this year. You'll be able to choose from a variety of environments, as well as add your own company logos to look a bit more professional. As for private channels, Microsoft says it'll arrive later this year, and it's currently being tested internally. When I asked why it took so long to add such a basic feature, a Microsoft representative said that it was due to Teams being built for corporate compliance, not just communication. Perhaps they thought you wouldn't need private channels, since everyone on your Team should technically be a part of every conversation.

Additionally, Microsoft is adding the ability to capture whiteboards using any USB camera, which will allow remote viewers to see exactly what's being written down, even if someone is in front of the board. It'll digitally "focus, resize and enhance whiteboard images and text" when it arrives later this year, the company claims. And together with that feature, Teams is also getting Microsoft Whiteboard support, which lets everyone on a call collaborate in a single space.