User federation
User federation allows Keycloak to connect with external user databases and credential repositories, enabling authentication without data migration. It supports LDAP, Active Directory, and custom databases via SPI. Users can be imported or validated in real-time, with attributes mapped to Keycloak’s model. Keycloak also integrates caching to enhance performance and supports SSO, IAM, and identity brokering. Federation ensures centralized access control while maintaining compatibility with existing identity systems, making it a key component in enterprise security architecture.
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