This document summarizes the evolution of enterprise identity management over time. It discusses business drivers for identity management from 1995-2014, challenges in extended enterprises, and Forrester's 2013 evaluation criteria for identity and access management. The evaluation criteria included user provisioning, attestation, separation of duties, single sign-on, federation, cloud support, and reporting. It then provides a timeline of major events in identity management standards and products from 1995 to 2011.