Maurice Henry continued the development of the city of Hadamar his father had begun.

He played a significant role in the development of infrastructure, civil order, public health, and social services.

On 17 July 1663, he officially continued the construction of the St. Elisabeth Hospital at the Upper Market Square, for which his father had laid the foundation.

After his father had converted to Catholicism, Maurice Henry was raised as a Catholic and he supported the Counter-Reformation in Hadamar.

His first marriage was on 30 January 1650 in Siegen with his cousin Ernestine Charlotte (23 October 1623 – 15 August 1668 in Hadamar), the daughter of Count John VIII of Nassau-Siegen.