After Austerlitz, Mack was convicted of cowardice by a court-martial. He was deprived of his rank, his regiment, and his honors, chiefly the Order of Maria Theresa, and imprisoned for two years. Upon his release in 1808, he lived in relative obscurity until 1819, when the ultimate victory of the allies had obliterated the memory of earlier disasters, he was, at the request of Prince Schwarzenberg, reinstated in the army as Feldmarschall-leutnant, and a member of the Order of Maria Theresa. He died on 22 October 1828 at S. Pölten.