In 1801 he joined the Teutonic Order, obtaining the Austrian Cross in 1804. After studying in the Collegium Teresianum of Wiener Neustadt, he was named Major General in the Austrian Army (1805). In 1809 he fought in Germany against the French; he clashed with the Napoleonic troops at Regensburg, leading his army towards Linz.
In 1830 Maximilian established himself in the Ebenzweier Castle, near Altmünster am Traunsee, while from 1831 to 1839 he lived in Linz. In 1835 he was named Grand Master of the Teutonic Order.