SusanBradleyGeek
I use only the standard Windows Update, plus its Microsoft Update option, as no other option is now available on my Windows Server 2019 version 1809 build 17763.1369 : neither preview filtering or some days of grace period (2 days would be greatly appreciated !).
The previews were installed, when I clicked on "Check for updates".
Do we need to understand from your answer that a workaround to this current Windows Update "bug by design" (not an official bug in MSFT terminology, but a limitation "by design", anyway a functional bug) is to never check for updates on these systems ?
We would have to only check if the update history seems correct enough, without being able to know if there is an important update pending ?