This is no surprise that the businesses today depend heavily on information technology than they ever did. It is one of these technologies that have made interoperability, interconnection and knitting of applications an easier task. EAI is the combination of hardware and software to share data and process in manner undisturbed and unrestricted for those applications and data files that have been so integrated. This research paper attempts to look at the evolution of EAI and the challenges that it faces presently and in future.