The COVID-19 pandemic has dramatically altered formal classrooms and traditional learning environments with many educational institutions forced to teach online. Communicative L2 classes are impacted as in-person, face-to-face interactions are key to developing communicative competence. This qualitative research study investigates if L2 communicative competence can be demonstrated via online synchronous computer-mediated communication (SCMC) platforms as an alternative to formal classrooms. Previous research on SCMC has focused on its implementation in a blended learning environment to support formal classrooms. The study analyzes seven recorded group interactions of 22 Japanese university students in a communication class for a presentation and discussion project done completely online while being physically isolated. The study observes whether L2 communicative competence can be demonstrated via expression, integration, and negotiation of meaning. Additionally, technological competence via procedural and technological negotiation is examined. The study shows that with careful planning, structured scaffolding from the instructor and technological familiarity and acceptance from the students, L2 communicative competence via SCMC platforms can be demonstrated, to varying degrees, when formal classrooms are not available. Formal classrooms may never be completely replaced but the development of SCMC platforms shows technological possibilities in future L2 learning environments.