BMC Password Reset Guide
From Internet Computer Wiki
Log in to your BMC via crash cart, KVM, or web interface, and change the BMC password to a strong password.
The below sections will guide you on changing the password via BMC web interface:
ASUS (ASMB10-iKVM)
Maintenance > System Administrator > reset password
Gigabyte (MegaRAC SP-X)
Maintenance > System Administrator > reset password
Dell (iDRAC9)
iDRAC Settings > Users > Local Users > select your user > Edit > reset password
Supermicro
Configuration > Users > select your user > Modify User > reset password