At this time, Italy, France and Spain demanded the immediate election of the pope, while the Holy Roman Empire preferred to first initiate the reform of the Church.
On 11 July 1418 Pope Martin V by recommendation of the Emperor nominated Johannes Ambundii to the position of Archbishopric of Riga where he stayed until 1424.
[2][3] On 13 October 1418 Ambundii participated in the negotiations between the State of the Teutonic Order and the Kingdom of Poland in Wileny.
The German brothers from the order deemed him a bitter and scant man, which is not a laudable trait for great men as a chaplain said.
The order tried to acquire Livonia as independent property from the Emperor and feared Ambundii would act in opposition to the efforts.