Sundance Now is available on the Xbox One console. Search for us by scrolling right on the Xbox home screen and searching for 'Sundance Now' in the store, or follow your country’s link below from your console:
United States: https://www.microsoft.com/en-us/store/p/sundance-now/9pmc6gc3d82n
United Kingdom: https://www.microsoft.com/en-gb/store/p/sundance-now/9pmc6gc3d82n
You can conveniently use your current login to access the app on Xbox. Don't have an account yet? Create one by clicking here.