"Contacts and relationships. Data about your contacts and relationships if you use a product to share information with others, manage contacts, communicate with others, or improve your productivity. Biometric data and identifiers. Data about you resulting from specific technical processing relating to your physical, physiological, or behavioral characteristics which allow or confirm unique identification. Other input. For example, data such as the buttons you press on an Xbox wireless controller using the Xbox network, skeletal tracking data when you use Kinect, and other sensor data, like the number of steps you take, when you use devices that have applicable sensors."
Microsoft collects contacts, biometric data, sensor data, skeletal tracking, images, voice clips, inking data, and installed app information — an extremely broad scope of device and personal data.