As I recall we were able to install the 1511 update through LT patching. However with 1607 and 1703, LT (Windows Update) reports success but the feature update KB doesn't install (still Missing). Testing with 1607, a manual install always worked so it wasn't an error during installation. I'm guessing Windows depends on the "select a time to restart" or something and doesn't know how to kick that off in the background.
If you open Windows Update and click the "learn more" link about "info on the latest updates" you get to https://support.microsoft.com/en-us/hel ... te-history
which has a link to the Creators Update. A couple links later you get to https://www.microsoft.com/en-us/softwar ... /windows10
which has the Update Assistant. On the patchmanagement.org list someone posted that "Windows10Upgrade.exe /QuietInstall /SkipEULA" works and it does, with caveats. It will start the upgrade and then start its 30 minute countdown timer in the background. Since no one cancels it, in 30 minutes the user sees a warning that the PC will reboot, and within a minute or so it does.
Another alternative is to turn on automatic Windows Updates for a while, and let it update itself. Obviously that is an issue for PCs that are off during that time.