The OSIM unattended.xml parameter SkipMachineOOBE, used for all Win Images is depricated and not supported by Microsoft any more.
https://qtechbabble.wordpress.com/2019/12/17/use-unattend-xml-to-skip-windows-10-oobe-during-sccm-task-sequence/
What's the new solution, to be used by ITCM OSIM?
Release : 14.5
Component : CA Client Automation
While Microsoft has deprecated the parameter SkipMachineOOBE setting in the unattended.xml continues to work without any problem. Engineering will replace this in next upcoming releases with new method which is still in work.