On October 5, the first hybrid multiplier event of the Erasmus+ KA2 project OER-Codex, led by TU Dresden, took place at the University of Applied Sciences (HTW Dresden). The aim was to share the results of a first work package on the methodological development of OER via the design and implementation of online collaborative courses (OCL) with a large audience that included both national and international participants. The results were presented as a handbook. More than 30 guests from different stakeholders (deans, staffs and students from economics, media, business, medicine) and countries (Germany, Ukraine, Lithuania, Slovenia, Georgia) were able to join the event either live or online and participate in discussions with members of the OER Codex Consortium. As a special highlight of the multiplier event, the OER Codex team was able to welcome invited guests from Ternopil, Ukraine: 14 professors and lecturers from WUNU (West Ukrainian National University), who participated in a complex training program on digitalization and internationalization of higher education at the Chair of Information Management at TU Dresden. Their visit took place within the framework of the DAAD-funded project "Ukraine digital: ensuring academic success in times of crisis". The first meeting of Ukraine digital and OER Codex showed that Ukrainian higher education institutions represent an important stakeholder group that can benefit from the future OER repository as a result of the OER-Codex project and should therefore be recruited as testing partners.