Eminent as teacher and pulpit orator, Nikolaus possessed great business acumen and was frequently chosen as ambassador both by the university and the reigning prince.
He represented Duke Albert V of Austria at the Council of Constance (1414–18) and the University of Vienna in the trial of Thiem, dean of the Passau cathedral.
When Emperor Sigismund came to Constance, Nikolaus delivered an address on the abolition of the schism ("Sermo de unione Ecclesiae in Concilium Constantiense," II, 7, Frankfort, 1697, 182–7).
Duke Albert V having chosen him as his confessor in 1425, wished to make him Bishop of Passau, but Nikolaus declined the appointment.
Among his numerous unpublished works, the manuscripts of which are chiefly kept in the Court library at Vienna and in the Court and State library at Munich, are to be mentioned his commentaries on the Psalms, Isaias, the Gospel of St. Matthew, some of the Epistles of St. Paul, the "Sentences" of Peter Lombard and "Questiones Sententiarum"; a commentary on the "Physics" of Aristotle, numerous sermons, lectures and moral and ascetic tracts.