Maybe you are wondering like me, why some of your 1607 clients do not get any MS-Patches via Ivanti EPM.
Support pointed out to me:
It is Because Win 10 Pro 1607 is End Of Life by Microsoft and newer patches are no longer offered to it. They need to update to a newer version: 1703, 1709 or 1803 to be offered patches for Pro.
https://support.microsoft.com/en-us/help/13853/windows-lifecycle-fact-sheet