Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.839

(a) A fiduciary or appraiser of an estate under the jurisdiction of the probate court in the county or probate court district in which he is a probate judge, probate register, or employee.

(b) An attorney or counsel in an action or matter which may depend upon, or relate to, a sentence or order made or entered by the probate judge in the county or probate court district in which he is a probate judge, probate register, or employee.

(c) An attorney or counsel for or against a fiduciary appointed under the jurisdiction of the probate court in the county or probate court district in which he is a probate judge, probate register, or employee, in any action or proceeding brought by or against the fiduciary as such or in any action or proceeding relating to the official conduct of that fiduciary.