Communication is currently undergoing an unprecedented transformation with adverse effects on organisational sustainability. It is therefore important that organisations pay attention to their internal communication to ensure that management, employees, and other stakeholders are kept informed throughout the change. Internal communication refers to the communication that takes place within an organisation and is an essential way of communicating policies and projects to employees. This paper examined the concept of internal communication for sustainable organisational management, focusing on the communication channels currently in use by organisations in Nigeria. The paper used the media richness theory (MRT) to understand the different perspectives of internal communication in Nigerian organisations. Particularly, it reviewed the appropriate channels for employee communication and concluded that internal communication is vital to the sustenance of any organisation and should be managed effectively.