Options such as external Single Sign-On can be managed under Account > Account Security.
Single Sign-On
By default, single sign-on is enabled to allow users to quickly access the client area from other services (such as cPanel) without having to reauthenticate. However, in some situations where direct access to these services is given to a third party, it may be preferable or necessary to restrict access to the client area. Unless such access is being given or another technical reason exists, single sign-on should remain enabled for convenience.
