Only for use with legacy tenants. By default, seamless single sign-on (SSO) is enabled for all new Auth0 tenants, however, legacy tenants may choose whether to enable this feature.
You can enable for your tenant using the . If you do not choose to enable tenant-level SSO, you may enable it per application. If you do not see this setting available in the Dashboard, you already have Seamless SSO enabled; this toggle is strictly for legacy tenants.