Single sign-on (SSO) allows a user to log into multiple systems with one set of credentials — typically managed by an enterprise identity provider like Okta, Microsoft Entra ID (formerly Azure AD), Google Workspace, or Ping Identity. For B2B customer portals, SSO is increasingly expected by enterprise customers whose IT teams manage employee identities centrally.
The main SSO protocols are SAML 2.0 (enterprise standard) and OIDC (modern, OAuth2-based). SCIM handles user provisioning and deprovisioning alongside SSO.
For the implementation patterns, see our SSO feature page and portal authentication guide.