In Winter 2024, as part of the larger migration of the 63 member MOBIUS library consortium to FOLIO, we migrated 60 of those institutions to the FOLIO ERM apps (Organizations, Agreements, Licenses, and eHoldings). This session will discuss the background, context, methodology, data gathering, and data migration aspects of our approach, as well as the outcome and lessons learned for future consortial FOLIO ERM migrations.