Because the password is not universal, you must locate it physically on the server hardware. Look for a (often called a "toe tag"):
Switch #6 is often used to disable the iLO security chip on Gen8/Gen9 – but that's a topic for another post. ilo 4 default login
On ML-series (tower) servers or older units, check for a sticker on the top or side of the chassis. Because the password is not universal, you must