confirmed working on windows 10 education 1909. it would be nice to be able to run it in windows preboot environment before windows starts
It should be 3 times. A little known fact is that after reaching the maximum count, a single KMS activation would allow another rearm. This is very useful when sysprepping images updated in place each time.
Windows 8 and 10 do not have Grace Period, you can rearm 100 time without any use the script in post #13 only reset the rearm count
Does that apply only to Enterprise though? Windows 7 Enterprise would also work without activation, but with black desktop.