Article version: Enterprise Server 2.20 Enterprise Server 3.0 Enterprise Server 2.22 Enterprise Server 2.21 Enterprise Server 2.20 GitHub AE See all Enterprise releases Enterprise Administrators Authentication Article version: Enterprise Server 2.20 Enterprise Server 3.0 Enterprise Server 2.22 Enterprise Server 2.21 Enterprise Server 2.20 GitHub AE See all Enterprise releases Authentication You can configure how users sign into GitHub Enterprise Server. Table of Contents Authenticating users for your GitHub Enterprise Server instance Using built-in authentication Disabling unauthenticated sign-ups Using CAS Using SAML Using LDAP Allowing built-in authentication for users outside your identity provider Changing authentication methods