Among recent enterprise systems (ES) research, not much attention and focus have been given to the use and management of ES. Thus, we will examine the daily operations of ES from the social integration (SI) perspective. The main purpose is to understand the influence of SI mechanisms in ES application. We adopt an interpretive case study approach, using 40 interviews with employees from a company with 10 years of experience in the management and application of ES. Based on our findings, we have identified three social integration mechanisms- relational reformation, structural reformation and cognitive construction that had influenced the transformation of individual knowledge and expertise to achieve efficient and effective use of ES.