Microsoft today released the latest 19H1 build, version 18323, to Fast Ring Insiders, a day and a few hours later than usual (Monday was a US holiday), but here it is. In recent builds, Microsoft has introduced "Windows Sandbox," a quick to deploy and quick to delete Virtual Machine, as well as a number of other improvements to the latest version of Windows 10, expected to be released to the public in March or April.
We're still waiting for a blog post and changelog, but the latest Fast Ring build, version 18323.1000.19H1_release.190119-1759 is now available, so go ahead and fire up your Windows Insider machines and get to downloading!
(Quick update) The Windows Insider Team did in fact plan to make the build available, but they're having issues getting the blog post out:
Yes we are working on the blog, but also be aware that you may see mixed availability of the build download across your devices as we work on our end. We'll announce later once it's all wrapped up and things are back to "normal". (2/2)
— Jason Howard (@NorthFaceHiker) January 24, 2019
We'll keep you posted...