With the growing demand for tertiary education, especially in Africa, the transformation of contact universities to dual-mode institutions is critical. However, conventional universities have had limited success establishing the dual-mode delivery stream. This paper assesses barriers to adoption and implementation of open and distance learning (ODL) in conventional higher education institutions in Cameroon, Kenya and Rwanda by applying a framework on innovation adoption to case studies of ODL in higher education in these countries. This qualitative meta-study shows that the transition to dual-mode is not systematic and that there are various barriers, ranging from national policy and funding; infrastructure, organisational structure and capacity; complexity and cost of ODL; as well as student and staff skills and perceptions, which have impeded adoption. Based on the findings, this paper makes recommendations for implementing ODL in existing conventional universities. Cases of successful transition to dual-mode are provided.