Using Xbox controller as a mouse

the original Xbox only came with a controller. the Xbox 360 only came with a controller. the Xbox One comes with a controller. you can't buy an Xbox One with a Keyboard and Mouse.
in my opinion if they don't sell them with a Keyboard and Mouse they shouldn't have support for Keyboard and Mouse. if you want to use
Keyboard and Mouse you should play on a PC and not on a console.

There is a converter coming for the Xbox 360 that will allow you to use a mouse, but since it has to actively "convert" the controls to mouse it'll never be as good as playing the game on a PC. But to be honest having true mouse control on an Xbox 360 would
give you an advantage over those who use controller as it's a more precise device.

Hi,

The Xbox One controller can not move the mouse, at least not on it's own. To move the mouse - or emulate the mouse - would require third party software. As for games, it depends on the game. While many PC games support the Xbox One controller from the
get go, some games need to be configured to use the controller.

What game are you trying to use with the controller?

For the following to work you must make the menu selections using your keyboard. If you use the controller to make your menu selections to start the game you will be placed in a room for those with a controller and your keyboard/mouse will be non functional
to make it fair to other players. To enter the room for keyboard and mouse users the game must be started by selecting the options using the keyboard/mouse. Hope this helps.

Mouse and keyboard support

Fortnite on Xbox One supports the ability to play with a mouse and keyboard. Note that when using a mouse and keyboard on Xbox One, you’ll be placed in a game with other users who also chose mouse and keyboard as their control option. To enable your setup
to use mouse and keyboard, see Mouse and Keyboard Support

Note If you’re on a child account, you’ll also need to enable settings for cross-network play to use a keyboard and mouse while playing
on Xbox One.

In order to keep an equal and fair multiplayer experience, you can only play with controllers on the Xbox One.

Games that work on the PC as well (like for example Gears of War 4) can be played with keyboard and mouse, but you can only play cooperative multiplayer with console owners that have to use controllers, so mouse and keyboard users don't have an advantage.

These XIM4 or Mayflash devices aren't real mouse and keyboard devices. These devices show themselves as a standard controller to the console, and when you move the mouse, the adaptor "guesses" from the speed you move the mouse, how hard it should push a
simulated controller stick in a certain direction.

These adaptors won't give you the same control as the mouse on a real PC.

When you stream the Xbox game screen to your PC, you can also only use a Xbox controller. Mouse and Keyboard won't work as a game input (you can only use the keyboard to enter text when the virtual keyboard is shown).

There are plans to get Keyboard and mouse working, if there ever is a way to stream the PC screen to the Xbox console.

But currently, if you're playing on the Xbox console, it's controller only (even if the controller is "guesstimated" with mouse and keyboard inputs).