[2] Mapinius did not attend the Fifth Council of Orléans in 549 in person, but he sent the archdeacon Protadius as his representative.
In the first, dated to between about 540 and 550 by the editors,[3] Mapinius congratulates Bishop Vilicus of Metz on his seventieth birthday.
[9] When he wrote back demanding to know the purpose of the council, he learned that the king wished to overturn Nicetius' excommunication of certain Franks for incest.
[10][11] In his letter to Nicetius, he claimed not have received this information until too late, but some scholars reject this explanation.
[10] Mapinius scolds Nicetius for not informing him directly of the council's purpose, and he asks about the guilt of the excommunicated parties and whether as a bishop he should receive them.