Interoperability enables the exchange and use of information between different systems or technologies to streamline processes. However, interoperability is a significant barrier to using cloud Enterprise Resource Planning (ERP) systems, even though Cloud ERP has gained traction compared to on-premise ERP solutions. Hence this research study aimed to understand the barriers hindering interoperability and explain approaches to ensure it when migrating from on-premise to Cloud ERP. This case study is qualitative in nature and utilised a hybrid thematic analysis method. Utilising an existing Enterprise Interoperability Framework as a guide, the study revealed several new and enriched system and non-system driven interoperability approaches across business, data, process, services, and systems. The study recommends opportunities for more case studies to be investigated and three potential research gaps have been identified to investigate interoperability approaches to resolve organisation change management, business process inefficiency and poor data quality prior to migrating from on-premise to a Cloud ERP.