Migrating identity providers without a flag day: A zero-downtime playbook

WorkOS presents a four-phase strategy for switching identity providers without a risky single cutover event. The approach emphasizes running both providers in parallel and migrating users gradually through shadow authentication, just-in-time provisioning during login, password hash imports, and staggered SSO connection transitions. Rather than orchestrating an all-at-once flag day migration that risks widespread lockouts, teams execute individual user migrations as they authenticate naturally, import credential data for inactive users, and convert enterprise SSO connections one at a time.