The University of Missouri System (UM System) consists of the University of Missouri-Columbia (MU), University of Missouri-Kansas City (UMKC), University of Missouri-St. Louis (UMSL), and the Missouri University of Science & Technology (Missouri S&T). For over two decades, the libraries of the UM System, along with the State Historical Society of Missouri, used Innovative Interfaces products as a shared integrated library system. In the summer of 2021, the libraries decided to migrate to FOLIO, with a go-live date of June 2022. This essay will examine some aspects of the migration and implementation process from a cataloging perspective, while also providing a discussion of significant challenges and workflow changes that came about post-implementation.