How to Implement Just-in-Time (JIT) User Provisioning with SSO and SCIM

Just-in-Time (JIT) and SCIM provisioning are two distinct methods for managing user accounts in identity systems, each with its unique advantages. JIT provisioning creates user accounts dynamically during Single Sign-On (SSO) authentication, simplifying onboarding by eliminating the need for pre-creation, and is ideal for quick SSO enablement, particularly for small to mid-market enterprises. It operates within the authentication flow using attributes from identity provider (IdP) responses and supports SAML and OIDC protocols. SCIM provisioning, on the other hand, involves managing users across systems using standardized APIs before login, providing comprehensive lifecycle management, including deprovisioning, and is essential for enterprise-grade control. While JIT is event-driven and reactive, SCIM is proactive and state-driven, ensuring lifecycle consistency. Combining both methods is recommended for enterprise-ready identity systems, offering the speed of JIT with the full control of SCIM, thus enhancing scalability and reliability.