Anyone can download the app and start collaborating with other users. If you're signed in to the app with an Office 365 account for work or school, you can also collaborate with multiple people within that organization.
As the iOS app launches for the first time soon, the team is also working on a version of Android in the future. It's not clear when this will be available, but the Whiteboard web version will work on Android-enabled devices at the same time. Microsoft does not restrict its Whiteboard application to any specific browser, and all major browsers are supported.
There are no technical restrictions on the number of people who can work on WhiteBoard, but Microsoft is curiously restricting the web and iOS versions to a business account in Office 365 at the moment. Whiteboard participants do not need to use a stylus to draw or comment, and keyboard and touch screen input is supported so that all modern devices can use the application. Microsoft also plans to integrate the Whiteboard application into the Microsoft Team Chat application and provide the application on the Surface Hub.
There are no technical restrictions on the number of people who can work on WhiteBoard, but Microsoft is curiously restricting the web and iOS versions to a business account in Office 365 at the moment. Whiteboard participants do not need to use a stylus to draw or comment, and keyboard and touch screen input is supported so that all modern devices can use the application. Microsoft also plans to integrate the Whiteboard application into the Microsoft Team Chat application and provide the application on the Surface Hub.