Microsoft has released both Windows 10 Insider Preview Build 17723 and Build 18204 to Windows Insiders

Today, we are releasing Windows 10 Insider Preview Build 17723 (RS5) to Windows Insiders in the Fast ring and Build 18204 (19H1) to Windows Insiders who have opted in to Skip Ahead.

Going forward, RS5 builds will come from the RS5_RELEASE branch. For Insiders who chose to “skip ahead”, 19H1 builds will continue to come from the RS_PRERELEASE branch. Insiders can see the branch name in the watermark at the lower right of their desktop. Right now, the builds from these branches are largely the same which is why we’re only doing a single blog post for both of today’s new builds. However, in the future we will be doing separate blog posts for each. To summarize all this, see the below graphic that explains what Skip Ahead is.

  Windows 10 Insider Preview Build 17723 and Build 18204 released