Single Sign-On (SSO) simplifies user authentication by allowing access to multiple domains with a single credential, reducing password fatigue and enhancing security. However, transitioning between SSO providers can be complex and disruptive, as each organization (or tenant) often requires individual reconfiguration. Descope offers an innovative migration method that bypasses this challenge by using DNS redirection and Descope Flows, allowing organizations to transition existing SSO customers without reconfiguration. This approach simplifies the traditionally labor-intensive process, enabling seamless migrations from providers like Auth0 and WorkOS to Descope, thereby freeing development teams to focus on core business activities rather than authentication infrastructure management. Descope's solution eliminates vendor lock-in and reduces customer churn risk, providing flexibility to move between legacy and modern CIAM solutions. The guide details the steps and technical configurations needed for this migration, emphasizing a disruption-free transition, and highlights Descope’s self-service SSO Setup Suite, identity orchestration capabilities, and enhanced migration process.