From the very beginning, the local parish of Marchegg was entrusted to the brothers. Over the years, the parishes of Breitensee and Markhof were also placed under their care. The priory has since become a place of retreat and prayer.

Regular catechetical teaching series are hosted in cooperation with the parish. Additionally, the brothers have become increasingly involved in various youth missions in Vienna, such as student chaplaincy, prayer groups, and more.