Mich. Ct. R. 5.120
The fiduciary represents the interested persons in a contested matter. The fiduciary must give notice to all interested persons whose addresses are known or who are authorized users of the electronic filing system under MCR 1.109(G)(6)(a) that a contested matter has been commenced and must keep such interested persons reasonably informed of the fiduciary's actions concerning the matter. The fiduciary must inform the interested persons that they may file a petition to intervene in the matter and that failure to intervene shall result in their being bound by the actions of the fiduciary. The interested person shall be bound by the actions of the fiduciary after such notice and until the interested person notifies the fiduciary that the interested person has filed with the court a petition to intervene.
Mich. Ct. R. 5.120