Pass the Microsoft Microsoft Certified: Security Compliance and Identity Fundamentals SC-900 Questions and answers with CertsForce

In Microsoft’s Security, Compliance, and Identity materials, Azure AD B2B collaboration is the feature designed for working with external organizations. Microsoft describes it as follows: “Azure AD B2B collaboration allows you to securely share your company’s applications and services with guest users from any other organization, while maintaining control over your own corporate data. Guest users sign in with their own work, school, or social identities, and appear as guest users in your directory.” This directly matches the sentence in the prompt—enabling collaboration with suppliers, partners, and vendors while ensuring that external users appear as guest users in the tenant.

By contrast, Active Directory Domain Services (AD DS) is an on-premises directory service for Windows domain joined resources and does not provide cloud guest user collaboration. Active Directory forest trusts establish trust relationships between AD DS forests for resource access, not modern cloud guest access using Conditional Access, MFA, or entitlement processes. Azure AD B2C is for consumer/retail scenarios where you build customer-facing apps, managing their identities in a separate customer directory; it is not intended for partner collaboration within your enterprise tenant. Therefore, the capability that fits the statement—external partner collaboration with users appearing as guest accounts—is Azure AD B2B.

In Microsoft Defender for Cloud, the Free plan provides continuous security assessment and visibility into your posture via Secure Score and security recommendations. Microsoft explains that the free tier offers “foundational CSPM capabilities,” including recommendations and a security score (Secure score) to help you prioritize hardening tasks. Advanced features—such as vulnerability scanning for VMs (Qualys-based), Just-In-Time (JIT) VM access, and threat protection alerts—require the enhanced/paid Defender plans (for example, Defender for Servers). Consequently, among the listed options, only Secure score is available in the free mode. This score aggregates the effect of recommendations across subscriptions and resources so you can track and improve security posture without enabling any of the paid Defender plans.