Abstract: A server platform hosting an integrated software-based identity management suite used in a system for authenticating users with respect to a legacy application. The identity management suite includes an administration console for domain administration, an authentication services module for user authentication, an activity intelligence engine for monitoring user activity, an open-source-based virtual layer for mapping fields of a legacy user directory to fields within the server platform, and an internal interface using an open communication protocol adapted to provide communication between the open-source-based virtual layer and at least the authentication services module within the server platform.