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

Microsoft’s identity guidance for Azure resources states there are two kinds of managed identities: system-assigned and user-assigned. The documentation describes that a system-assigned identity is scoped to a single resource and follows its lifecycle: “A system-assigned managed identity is created in Microsoft Entra ID and is tied to the lifecycle of that Azure service instance. When the resource is deleted, Azure automatically deletes the identity.” By contrast, a user-assigned identity is reusable across resources: “A user-assigned managed identity is a standalone Azure resource… It can be assigned to one or more Azure service instances and is managed independently of the resources that use it.”

Because the scenario requires multiple Azure web apps to use the same identity, the only managed identity type that supports this sharing model is the user-assigned managed identity. This allows you to grant RBAC permissions once to the identity and then attach that same identity to several App Service instances, simplifying secretless access to Azure resources (Key Vault, Storage, SQL, etc.) and providing centralized lifecycle and rotation management. Certificates or generic service principals would reintroduce credential management, while a system-assigned identity cannot be shared across multiple apps. Therefore, a user-assigned managed identity is the correct choice.

Microsoft’s SCI/Learn content describes Azure AD (now Microsoft Entra ID) as a cloud service, not something you install on-premises. The docs state Azure AD is a “cloud-based identity and access management service” that “helps your employees sign in and access resources.” This clarifies the third statement (IAM service) as Yes, and the first statement (on-premises deployment) as No, because the native on-prem directory is Windows Server Active Directory, whereas Azure AD runs in Microsoft’s cloud and can be synchronized with on-prem AD via tools like Azure AD Connect.

Microsoft also explains licensing/availability: the service comes in several editions, and the free/Office 365 tier is included with many suites. The documentation explicitly notes that Azure AD is “included with subscriptions such as Microsoft 365” (formerly Office 365) and provides tenant-wide identity for those services. Therefore, stating that Azure AD is provided as part of a Microsoft 365 subscription is Yes.

In summary: Azure AD/Entra ID is a cloud identity and access management platform; it’s not deployed on-premises, and Microsoft 365 subscriptions include an Azure AD tenant/edition to manage users, groups, apps, and access policies.

Microsoft Defender for Office 365 is the Microsoft 365 solution designed to protect users from threats delivered through email and collaboration workloads. SCI training material explains that Defender for Office 365 protects Exchange Online, Microsoft Teams, SharePoint Online, and OneDrive for Business by detecting and blocking malware, phishing, and other advanced attacks that use messages and shared content as the delivery channel.

A key capability is Safe Links, which specifically protects against malicious URLs. When a user receives an email, Teams chat message, or channel post that contains a hyperlink, Safe Links scans and rewrites that URL. At the moment the user clicks, the link is checked again; if it is identified as malicious or leads to a known phishing or malware-hosting site, access is blocked and a warning page is shown. This time-of-click protection is emphasized in Microsoft’s security documentation as a primary defense against weaponized links in email and collaborative communications.

By comparison, Microsoft Defender for Identity focuses on detecting identity-related threats in on-premises Active Directory, Defender for Endpoint protects devices and endpoints, and Defender for Cloud Apps secures SaaS applications and shadow IT. None of these are the primary solution for blocking malicious links in email, chats, and channels. Therefore, the correct choice is Microsoft Defender for Office 365.

Microsoft Purview Compliance Manager organizes improvement actions into control action subcategories that mirror core security control types used throughout Microsoft Learn’s SCI content: preventative, detective, and corrective. In the SC-900 security fundamentals guidance, Microsoft describes these control types as follows: “Preventive controls are intended to deter or stop an attack from occurring (for example, encryption and access controls). Detective controls are used to discover and detect attacks that are in progress or have occurred (for example, logging, auditing, and monitoring). Corrective controls are used to limit the damage caused by an incident and to return systems to normal operations (for example, configuration changes, incident response, and recovery activities).”

Applying those definitions to Compliance Manager actions: Encrypt data at rest is a preventative control because it deters exposure by protecting data before an event. Perform a system access audit is a detective action because auditing and reviewing access logs are used to discover and detect misuse or anomalies. Make configuration changes in response to a security incident is a corrective action because it remediates and restores the environment after detection, aligning with Compliance Manager’s corrective action guidance. These mappings reflect how Compliance Manager measures completion of improvement actions that reduce compliance risk through the right mix of preventative, detective, and corrective controls.

In Microsoft Purview Compliance Manager, improvement actions are categorized by control type to reflect how they reduce risk and contribute to your compliance score. Microsoft’s SCI guidance explains that preventative controls are safeguards that “prevent a security or compliance incident from occurring by enforcing protections in advance (for example, enforcing encryption of data at rest and in transit, access restrictions, and configuration baselines).” This directly aligns with the task “Use encryption to protect data at rest”, which is a classic prevention mechanism intended to stop unauthorized disclosure before it can happen.

The guidance also states that detective controls are measures that “identify, log, and surface anomalous or non-compliant activities so they can be investigated and addressed (for example, continuous monitoring, alerting, audit logging, and analytics).” This maps to “Actively monitor systems to identify irregularities that might represent risks”, because the goal is to detect suspicious behavior or drift as it occurs.

By comparison, corrective controls are used to “remediate issues and restore a desired state after a problem is discovered (for example, patching, incident response, or configuration correction).” No corrective action is described in the two listed tasks, so Corrective is not selected. This mapping reflects how Compliance Manager classifies actions that contribute points to the compliance score based on their risk-reducing impact.

In Microsoft’s Security, Compliance, and Identity learning content and product documentation, Intune administration is performed in the dedicated Intune portal that, for exam and study-guide purposes, is referred to as the Microsoft Endpoint Manager admin center. Microsoft explains that “Microsoft Intune is a cloud-based service that focuses on mobile device management (MDM) and mobile application management (MAM)” and that “administrators manage Intune in the Intune (Endpoint Manager) admin center, where you configure device enrollment, compliance, apps, and endpoint security.” The admin experience consolidates device, app, and policy management, including device compliance policies, configuration profiles, app protection policies, software update rings, and endpoint security baselines, all from this portal.

By contrast, the Azure Active Directory admin center (Microsoft Entra admin center) is designed for identity and access tasks (users, groups, roles, Conditional Access), not full device/app management. The Microsoft 365 compliance center is focused on data governance and risk (DLP, information protection, eDiscovery, audit), while the Microsoft 365 security center/Defender portal is for security operations and threat protection. Therefore, when the sentence states, “You can manage Microsoft Intune by using the…,” the correct completion—aligned with Microsoft SCI study materials—is Microsoft Endpoint Manager admin center, the portal intentionally built for Intune device and app lifecycle management.

In Microsoft Sentinel, playbooks are the feature that integrates with Azure Logic Apps to automate response. Microsoft’s documentation describes them as “collections of procedures that can be run from Microsoft Sentinel in response to an alert” and clarifies that “playbooks are built on Azure Logic Apps” providing a workflow engine and a gallery of connectors to other Microsoft and third-party services. Playbooks can be triggered automatically from analytics rules or manually from incidents and alerts, enabling orchestration such as assigning owners, creating tickets, disabling accounts, blocking IPs, or posting to collaboration channels. The platform emphasizes that the Logic Apps foundation gives security teams a visual designer, managed connectors, and run history to track execution and outcomes. In short, Sentinel uses playbooks to “automate and orchestrate responses to alerts and incidents”, reducing mean-time-to-respond and standardizing actions across your SOC. Other Sentinel components serve different purposes: analytic rules detect threats, hunting queries aid proactive investigation, and workbooks provide dashboards and visualizations. Therefore, the correct completion is: Microsoft Sentinel playbooks use Azure Logic Apps to automate and orchestrate responses to alerts.

Microsoft’s SCI guidance defines the supported passwordless methods in Entra ID (Azure AD). The documentation states: “Microsoft recommends three passwordless authentication options: Windows Hello for Business, FIDO2 security keys, and the Microsoft Authenticator app (phone sign-in).” Windows Hello for Business “replaces passwords with strong two-factor authentication on Windows devices,” allowing users to sign in with a gesture (biometric or PIN) that does not require a password during interactive sign-in. Likewise, “FIDO2 security keys enable users to sign in using an external security key,” providing a standards-based passwordless credential that can work across supported browsers and devices.

By contrast, OATH software tokens (for example, time-based one-time passcodes in an authenticator app) are documented as multifactor verification methods: “OATH software tokens generate time-based codes used for MFA.” These OTP codes serve as a second factor and are not a passwordless primary sign-in method; users typically still enter a password and then the OTP. Therefore: software tokens → No (not passwordless), Windows Hello → Yes, FIDO2 security keys → Yes. This mapping aligns directly with Microsoft’s Entra ID passwordless authentication guidance and the delineation between passwordless sign-in and MFA second-factor methods.

In Microsoft’s Security, Compliance, and Identity materials, Customer Lockbox is described as the feature that controls any Microsoft engineer access to your tenant content during support operations. Microsoft states that Customer Lockbox “ensures that Microsoft cannot access your content to perform a service operation without your explicit approval.” It is specifically applicable to Microsoft 365 workloads that store customer data, including “Exchange Online, SharePoint Online, and OneDrive for Business.” When a support case requires elevated access, “a lockbox request is created and routed to the customer for approval or rejection,” and access is only granted if the organization’s authorized admin approves the request within the defined window. The request contains who is requesting access, the reason, the scope, and the duration, and all actions are audited for compliance reporting. This capability aligns with Microsoft’s zero standing access principles by making engineer access time-bound, least-privileged, and customer-approved. By contrast, Information barriers segregate communications between groups, Privileged Access Management (PAM) governs privileged tasks inside Microsoft 365, and Sensitivity labels classify and protect data. Therefore, the feature that “can be used to provide Microsoft Support Engineers with access to an organization’s data stored in Microsoft Exchange Online, SharePoint Online, and OneDrive for Business” is Customer Lockbox.

Microsoft 365 Insider Risk Management follows a clear operational flow: Triage → Investigate → Action. Microsoft’s guidance explains that the Alerts dashboard is used first to review and filter alerts, prioritize by severity, and decide what needs deeper review—this is the Triage stage. The documentation describes triage activities as reviewing alert details, applying filters, and determining whether an alert should be escalated for investigation.

When an alert warrants deeper inquiry, analysts move to Investigate, where they create cases, add relevant alerts and users, and examine activity timelines and related signals. Microsoft states that cases are the vehicle for structured investigations, allowing analysts to group evidence and manage workflow from the Case dashboard.

After investigation, organizations proceed to Action, where insider risk controls allow response steps such as sending user policy reminders, escalating to HR or legal, or taking other governance actions. Microsoft describes that actions can include notifying the user with a policy reminder to reduce future risk or applying stronger controls, all of which are part of the response phase.

Accordingly, the correct matches are: Triage → Review and filter alerts, Investigate → Create cases in the Case dashboard, and Action → Send a reminder of corporate policies to users.