Google Apps was deployed at the University of Cambridge to provide calendar functionality to over 40,000 users across 100 departments and 32 colleges. A Java-based single sign-on application called gAuth was created to integrate Google authentication with the University's existing Raven authentication system. While rollout went smoothly, ongoing issues included conflicting accounts and support responsibilities. Usage grew steadily, with unique daily and monthly users increasing since the October 2010 launch.