Enable Single Sign-On for Tenants
You can enable SSO for your tenant using the Auth0 Dashboard. 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.
Go to Dashboard > Tenant Settings.
Go to the Advanced tab.
Scroll to the Log In Session Management section. Locate Enable Seamless SSO and enable the toggle.
Once finished, you should also configure your session lifetime settings.