A company uses Microsoft Entra ID (Microsoft Entra ID). They want to allow users to sign in to multiple SaaS applications using their Microsoft Entra ID credentials without being prompted again for each application. Which Microsoft Entra ID feature should they enable?
Trap 1: Multi-Factor Authentication (MFA)
MFA requires a second verification factor (like a TOTP code or FIDO2 key) at initial sign-in, but it does not create or propagate a shared session across multiple applications. Even after MFA succeeds, each app that doesn't participate in the same Entra ID session will still prompt for credentials or its own MFA challenge. Thus, MFA strengthens security but fails to remove the repeated authentication prompts the user wants to eliminate.
Trap 2: Conditional Access
Conditional Access evaluates signals (user, device, location, risk) to enforce access policies such as blocking or requiring MFA, but it operates at the policy layer rather than the authentication session layer. It can manage when a session is allowed or challenged, yet it does not generate a single-sign-on token stream that carries identity across apps. Therefore, it can refine SSO but cannot itself replace the need for a shared authentication session.
Trap 3: Identity Protection
Identity Protection uses machine learning to detect compromised identities and risky sign-ins, triggering automated responses like forced password resets or conditional access policies. It is a risk-assessment and remediation engine, not an authentication protocol or session manager, so it does nothing to suppress the repeated authentication prompts between applications. Its role is to mitigate threats, not to federate identity for seamless access.
- A
Single Sign-On (SSO)
SSO in Microsoft Entra ID uses the primary authentication token (e.g., SAML, OAuth2/OIDC) to establish a federated session, so subsequent application requests are silently authenticated without re-prompting. This works because Entra ID acts as the trusted broker that issues session cookies or refresh tokens, eliminating per-app credential entry. For this scenario, deploying SSO directly satisfies the requirement for one authentication followed by seamless access across all integrated applications.
- B
Multi-Factor Authentication (MFA)
Why it fails: MFA requires a second verification factor (like a TOTP code or FIDO2 key) at initial sign-in, but it does not create or propagate a shared session across multiple applications. Even after MFA succeeds, each app that doesn't participate in the same Entra ID session will still prompt for credentials or its own MFA challenge. Thus, MFA strengthens security but fails to remove the repeated authentication prompts the user wants to eliminate.
- C
Conditional Access
Why it fails: Conditional Access evaluates signals (user, device, location, risk) to enforce access policies such as blocking or requiring MFA, but it operates at the policy layer rather than the authentication session layer. It can manage when a session is allowed or challenged, yet it does not generate a single-sign-on token stream that carries identity across apps. Therefore, it can refine SSO but cannot itself replace the need for a shared authentication session.
- D
Identity Protection
Why it fails: Identity Protection uses machine learning to detect compromised identities and risky sign-ins, triggering automated responses like forced password resets or conditional access policies. It is a risk-assessment and remediation engine, not an authentication protocol or session manager, so it does nothing to suppress the repeated authentication prompts between applications. Its role is to mitigate threats, not to federate identity for seamless access.