Microsoft releases first Windows 10 Redstone 4 preview for HoloLens

[Windows Central]

Windows 10 build 17123 for HoloLens is now available for download, but installing it is a little complicated.
It's been a long time since HoloLens last received a major Windows 10 update. The last was in 2016 with the Anniversary Update, and hasn't received any feature updates since. Today, that all changes however, as Microsoft has finally released a preview build of Windows 10 Redstone 4 for HoloLens!

Full story from the WindowsCentral blog...