An organization completed a project to deploy SSO across all business applications last year. Recently, the finance department selected a new cloud-based accounting software vendor. Which of the following should most likely be configured during the new software deployment?

SAML (Security Assertion Markup Language) is the most suitable choice for integrating a new cloud-based accounting software with an existing SSO solution. SAML is an XML-based standard for exchanging authentication and authorization data between an identity provider (IdP) and a service provider (SP), which is precisely what's needed for SSO with a cloud application. RADIUS is primarily used for network access control (e.g., VPNs, Wi-Fi) and is not designed for web-based application SSO. EAP (Extensible Authentication Protocol) is an authentication framework used within other protocols like RADIUS, not a standalone SSO solution for cloud applications. OpenID is an authentication protocol, but OpenID Connect (OIDC) is more commonly used for modern web and mobile applications, often alongside OAuth 2.0 for authorization. While OIDC could be an option, SAML is a well-established and widely supported standard for enterprise SSO with cloud services.