enterprise fleets

Enterprise fleets managing Windows 11 deployments should note that version 26H1 is a platform-first build reserved exclusively for new Arm silicon devices. Microsoft has confirmed it is not offered as an in-place update from versions 24H2 or 25H2 on existing machines. This means IT administrators cannot treat 26H1 as a standard feature update for their current fleet. Instead, it targets OEMs and organizations procuring next-generation hardware. The release enables new silicon capabilities but requires careful planning to avoid confusion with broader Windows 11 updates. Enterprise fleets should continue using 24H2 or 25H2 for existing devices while evaluating 26H1 only for new hardware acquisitions.