While in Paris, he was invited to accompany Peter IV during his campaign to return Portugal to a liberal monarchy, and departed on 25 January 1832 for Terceira, from Belle-Isle. He was appointed "Ministro e Secretário de Estado dos Negócios da Fazenda" ("Minister and Secretary of State for Finance Affairs") and interim "Ministro dos Negócios Eclesiásticos" ("Ministry of Ecclesiastical Affairs") and "Ministro da Justiça" ("Minister of Justice") in Angra on 2 March 1832. On 23 April 1832, accompanied by Peter IV, he traveled to Ponta Delgada, before departing the Azores with an expeditionary force to Mindelo. While in the Azores, Mouzinho promulgated 24 decrees and ordinances to reform the administration of the islands’ government.