Microsoft is rolling out a new build of its Redstone 5 branch, which will eventually become the next major update to Windows 10 (which should land later this fall). Windows 10 Insider Preview Build 17686 has been pushed out onto the Fast ring and brings with it a few new changes.
Microsoft is adding some tweaks to its privacy settings, including

Source: Hot Hardware – Windows 10 Redstone 5 Build 17686 Paves Way For Fall 2018 Update