Fe3+-OH groups of a Fe-H-BEA sample prepared by conventional ion-exchange method are characterized by an IR band at 3686-3684 cm(-1). They exhibit a weak acidity: upon low-temperature CO adsorption the O-H stretching modes are blue shifted by 100 cm(-1) and the respective carbonyl adducts are observed at 2158 cm(-1). The Fe3+-OH groups are reduced at room temperature by NO to form Fe2+-NO species and NO+ groups in cationic positions. Desorption of pre-adsorbed NO at temperatures above 373 K regenerates the Fe3+-OH groups. The relation of the Fe3+-OH species to the so-called alpha-oxygen is discussed.