This case study refers to the eTandem pre-mobility project coordinated by the Padova University Language Centre running twice a year since 2015 for approximately eight weeks. The project matches up local university students with incoming international students, thus boosting integration between the two groups and increasing internationalisation at home. One-to-one and many-to-many interactions are organised, the latter with the support of trained facilitators, who launch asynchronous (in an online multilingual community) and synchronous, intercultural, theme-based learning activities to be discussed every week. Students' linguistic, intercultural, and digital competences, as well as autonomy, are enhanced throughout the project, making them better prepared for their mobility. [For the complete volume, "Designing and Implementing Virtual Exchange -- A Collection of Case Studies," see ED609252.]