Supermicro X11DAC User Manual page 176

Super X11DAC User's Manual
Remove 'UEFI CA' from DB (available when the system is not in Device

Guard Ready)
Select and press Yes to remove Microsoft UEFI CA certificate from the DB. The options
are Yes and No.
Restore DB defaults

Select and press Yes to restore the DB variables to factory defaults. The options are
Yes and No.
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