How to use HoloLens Offline & Update HoloLens
How to use HoloLens Offline & Update HoloLens – HoloLens can be connected via Wi-Fi network. When Wi-Fi is not present, HoloLens can be used but with some limits.
When Wi-Fi is not available, then your HoloLens can not be detected in your space. In order to connect manually, Go to settings > systems > spaces. Now select the space you want and select load space.
How to update HoloLens?
Although HoloLens always check for system update. It means when update is available, automatically download exist. In order to manually update. Go to settings > update > check for update. Be ensure that your HoloLens is to up to date and no any update remained there.