slmgr.vbs -ipk neue_Seriennummer (win10)
slmgr.vbs -ato neue_Seriennummer (win server 2019)
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slmgr.vbs -ato xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
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cd C:\Program Files\Microsoft Office\Office16
bzw.
cd C:\Programme\Microsoft Office\Office16
dir
cscript OSPP.VBS /dstatus
cscript OSPP.VBS /inpkey:DEMOK-EYxxx-xxxxx-xxxxx-xxxxx