Identity Federation has become an essential business need to modernize capability and adapt to the evolving landscape of computing. The focus to achieving Identity Federation often revolves around product solutions that attempt to solve identity federation with agents, adapters, and rip-and-replace environment disruption. Forum Systems provides a different vision and proven capability to achieve secure identity federation. In this paper, we will discuss how to achieve identity federation in a landscape of existing IdM systems, repositories, directory services, and other user information stores by unifying these capabilities via a federation services architecture tier.