Single Sign-On allows users to log in to a cPanel & WHM or Plesk hosting account directly from a link in WHMCS without reauthenticating.
Application Links use WHMCS Single Sign-On to allow users to seamlessly access WHMCS from the cPanel & WHM control panel.
Troubleshoot and resolve `OAuth authorization request denied due to unexpected active login session for 'Closed' User ID` errors.
Troubleshoot and resolve `Single Sign-On authentication denied for 'Closed' User ID` errors when attempting to use WHMCS single sign-on.
Troubleshoot and resolve `Single Sign-On authentication denied per configuration for User ID` errors when single sign-on is disabled.
Troubleshoot and resolve `Unable to authenticate with Single Sign-On token for User ID` errors during WHMCS single sign-on.
Single Sign-on allows trusted applications and third parties to log users in to WHMCS automatically, without reauthentication.