Every time a user selects the Web sign-in credential provider at the login screen, the WsiAccount is enabled to manage the secure handshake between the hardware and the web-based authentication service.
If a system update or a policy change partially enables web-based authentication, the system-managed account may become visible. wsi account
Users occasionally report seeing "WSI Account" as a selectable user on their lock screen. This typically happens due to: Every time a user selects the Web sign-in