[2] In the 1380s, Margareta began addressing churchmen, describing the spiritual state of the Sami people and urging church authorities to fulfil their responsibilities to them.
Petri praised her for her missionary work, comparing her to Saint Bridget, another woman calling for church reform who was being canonised at the time, and recommended that the Bishop of Uppsala should assist her.
On 6 August, Queen Margaret and Bishop of Lund Magnus Nielsen issued a letter to the Sami people, urging their conversion and baptism, and entrusting further mission work to the archbishop of Uppsala.
[4] Margareta's work as a missionary was last mentioned on 17 March 1414, when she received another glowing recommendation from Abbot Sten of the Birgittine monastery Munkaliv in Bergen.
Sten pointed out that, since the Sami people paid taxes, they were entitled to support in return, and expressed his admiration for Margareta's commitment to the cause.