Has 11 beta-hydroxylation, 18-hydroxylation activities and aldosterone synthetic activity. Catalyzes the final steps of glucocorticoid and mineralocorticoid biosynthesis. a steroid + 2 H(+) + O2 + 2 reduced [adrenodoxin] = an 11beta-hydroxysteroid + H2O + 2 oxidized [adrenodoxin] Belongs to the cytochrome P450 family.