By the Portuguese law of banishment of 1834 and the constitution of 1838 Miguel was forbidden to enter Portugal. Therefore, he was educated in Germany and Austria. He was a member of the staff of Emperor Franz Josef of Austria and took part in the occupation of Bosnia. It is said that the emperor liked Miguel immensely and granted him the privilege of extra-territoriality that allowed him to remain Portuguese, despite the rejection of Portugal.
Miguel held the rank of a colonel in the 7th Austrian Regiment of Hussars. During World War I, he held the rank of Lieutenant General (Feldmarschalleutnant) in the Austrian army. He resigned in 1917 when Portugal entered the conflict on the opposite side, and spent the rest of the war as a civilian in the Order of Malta. After the end of the Austro-Hungarian Empire, Miguel and his family were thrown into relative poverty.
On 31 July 1920, after quarrels with his eldest son (who contracted a controversial marriage to an American heiress), Miguel II abdicated his claims as king of Portugal in favour of his third son, Duarte Nuno, who was 13 years old at the time.
Miguel died in Seebenstein, on October 11 1927. He is buried at Kloster Maria Himmelfahrt in Bronnbach.
Miguel's first marriage, with Princess Elisabeth of Thurn and Taxis (May 28 1860 - February 7 1881) took place on October 17, 1877 in Regensburg. They had three children.
After the death of his first wife he married for a second time on 8 November 1893 at Kleinheubach with Princess Maria Theresa of Löwenstein-Wertheim-Rosenborg (1870-1935). They had eight children.
|- |}