Non-Profit Organizations (NPOs) need to be adaptive to respond to constantly changing environments. Sustainable innovations, therefore, become critical for achieving their sustainability visions. IT capability is widely recognised as a critical enabler for sustainable innovations. However, research on IT capability for sustainable innovations in NPOs is currently lacking. Hence, this study aims to explore how NPOs manage IT capability to support sustainable innovations from a resource orchestration perspective. Our case study shows that an organization’s digital orientation complements its strong sustainable orientation and underpins IT capability management. In addition, a strong IT capability for sustainable innovations comprises flexible IT infrastructure, valued IT human and knowledge, and close IT-business partnership. Although our study has confirmed that IT is critical for sustainable innovations in a NPO, due to resource constraints, the IT department is more proactive in exploitative innovations while reactive in exploratory innovations. Ultimately, IT primarily serves as a supporting function.