Enable Active Directory Schema (for mmc)

REM my channel https://www.youtube.com/user/Boliccov
REM in cmd.exe
regsvr32 schmmgmt.dll
REM mmc (microsoft management console) - select Active Directory Schema [FQDN]
mmc
REM you have 1 Classes & 2 Attributes
REM resultat https://imgur.com/fmSliQq