Microsoft has started rolling out October's Xbox system update to all users, with this latest release introducing the previously announced ability to remap keyboard keys to Xbox controller buttons, alongside a number of other features.
Microsoft confirmed the new accessibility feature was undergoing Insider testing earlier this month, explaining its introduction would enable users to remap almost 90 keyboard keys - or combinations of keys - to any button on the Xbox Adaptive Controller and Elite Series 2. This would, for instance, make it possible for players with limited mobility to use the Xbox Adaptive Controller with games ordinarily only supporting mouse/keyboard.
Keyboard mapping for Xbox controllers will be available through the Xbox Accessories app on PC and console once October's update has been installed.