Microsoft SC-900 - Microsoft Security Compliance and Identity Fundamentals

Endpoint data loss prevention (Endpoint DLP), a feature in Microsoft Purview, supports Windows 10 and 11 and now also supports macOS for core DLP capabilities. It allows organizations to monitor and restrict actions like copying sensitive files to USBs, printing, or uploading to unapproved cloud services.

SCI Extract: "Endpoint DLP extends Microsoft Purview Data Loss Prevention to Windows 10, Windows 11, and macOS devices, allowing for monitoring and control of sensitive data usage at the endpoint."

Other platforms like Linux, iOS, and Android are not currently supported for Endpoint DLP

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.

Microsoft Purview Data Loss Prevention (DLP) defines supported service locations for policy enforcement. The Microsoft Learn/SCI materials state that DLP policies “help protect sensitive information across Microsoft 365 services” and can be scoped to common workloads. In the DLP overview, Microsoft explicitly lists the core cloud locations: “You can create DLP policies that protect content in Exchange Online, SharePoint Online, and OneDrive for Business.” The Teams workload is also included: “DLP can monitor and take protective actions on Microsoft Teams chat and channel messages.” These statements confirm that applying a DLP policy to Exchange Online email (A), OneDrive accounts (B), and Teams chat and channel messages (D) is supported.

By contrast, Exchange Online public folders (C) are not listed among supported DLP locations in the SCI documentation, and Viva Engage (formerly Yammer) (E) is not a standard Microsoft Purview DLP location in the core list above (Viva Engage has separate governance and communication compliance controls). Therefore, from the supported locations enumerated in Microsoft’s DLP guidance, the correct answers are Exchange Online email, OneDrive accounts, and Teams chat and channel messages.

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.

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Microsoft’s Windows Hello for Business replaces passwords with strong, two-factor authentication that is tied to the device and unlocked with a user gesture. The Microsoft Learn description states that Windows Hello for Business “replaces passwords with strong authentication” and that “users sign in using a gesture, such as a PIN, facial recognition, or fingerprint.” It further clarifies that the credential is protected by the device’s secure hardware and that the gesture (PIN or biometric) unlocks the private key used to authenticate. The guidance explains that “biometrics (face or fingerprint) or a PIN” are supported as the user’s sign-in method, and that the PIN “is unique to the device” and does not roam, reducing attack surface.

By contrast, email verification and security questions are not authentication gestures for Windows Hello for Business. They are not listed as supported methods for unlocking the Hello for Business key or completing interactive sign-in to Windows. Therefore, the three supported Windows Hello for Business authentication methods from the options provided are fingerprint, facial recognition, and PIN. This aligns with Microsoft’s documented model where the user enrolls a biometric (face or fingerprint) or creates a PIN, and subsequently uses that gesture to unlock the hardware-bound credential for secure sign-in and access to resources.

In Microsoft’s Security, Compliance, and Identity guidance, Data Loss Prevention (DLP) is configured from the compliance portal (formerly called the Microsoft 365 Compliance Center, now Microsoft Purview compliance portal). Microsoft’s documentation states that DLP is administered from the compliance experience: “Use data loss prevention (DLP) policies in the Microsoft Purview compliance portal to help identify, monitor, and automatically protect sensitive items” across Microsoft 365 workloads. It further specifies where you create policies: “To create a DLP policy, go to the Microsoft Purview compliance portal > Data loss prevention > Policies and choose Create policy.” The portal provides policy templates, locations, and rules that “help prevent the inadvertent sharing of sensitive information” and enable “policy tips and automatic remediation actions” (such as restricting access, auditing, or blocking).

By contrast, the Microsoft 365 admin center is for tenant administration and licensing, not DLP policy authoring. The Microsoft Endpoint Manager admin center (Intune) manages device and app protection policies, not Microsoft 365 DLP policies. The Microsoft 365 Defender portal surfaces security alerts and investigations but does not host the creation workflow for DLP policies. Therefore, when the requirement is to create a DLP policy, Microsoft directs administrators to the Microsoft 365 Compliance center (Microsoft Purview compliance portal) where the DLP solutions and policy creation wizard reside.

Microsoft Defender for Office 365 includes Safe Attachments, a protection that “checks attachments in a secure, virtual environment to detect malicious behavior.” In Microsoft’s guidance, Safe Attachments is described as part of the anti-malware pipeline that “routes messages with attachments to a detonation chamber; if no suspicious activity is detected, the message is released to the recipient, and if malicious behavior is found, the attachment is blocked or removed.” Administrators can choose Block, Replace, Dynamic Delivery, or Monitor actions. The Dynamic Delivery option specifically supports the use case in the question: the email body is delivered while the attachment is scanned, and “the attachment is automatically reattached and forwarded to the recipient only when it is determined to be safe.” This capability is unique to Defender for Office 365’s Safe Attachments, not to be confused with endpoint antivirus or identity tools. Defender Antivirus protects Windows devices, Defender for Identity secures on-premises identities, and Defender for Endpoint focuses on endpoint detection and response. Therefore, the Microsoft service you use to scan email attachments and forward them only when clean is Microsoft Defender for Office 365 (Safe Attachments).

In Microsoft Entra ID Protection, risk-based Conditional Access policies use signals such as User risk and Sign-in risk to evaluate potential threats during authentication and identity usage. These are core to adaptive access and identity protection features taught in Microsoft’s SC-300 and SC-900 learning paths.

User risk:

Defined by Microsoft as: “The probability that a specific identity or account is compromised.”

User risk is assessed based on activities and behaviors that indicate the account may have been compromised—such as leaked credentials or atypical user activity over time.

Sign-in risk:

Defined as: “The probability that the authentication request is not performed by the legitimate identity owner.”

Sign-in risk is calculated at the time of authentication based on indicators such as unfamiliar locations, anonymous IP addresses, impossible travel, or malware-linked sign-ins.

These signals help automate access decisions, such as requiring MFA or blocking access, based on real-time risk assessments.

 An external email address can be used to authenticate self-service password reset (SSPR). → Yes

 A notification to the Microsoft Authenticator app can be used to authenticate self-service password reset (SSPR). → Yes

 To perform self-service password reset (SSPR), a user must already be signed in and authenticated to Azure AD. → No

For Microsoft Entra self-service password reset (SSPR), users must register one or more authentication methods that can later be used when they forget their password or are locked out. Microsoft’s end-user guidance states that an email address option lets users configure “an alternate email address that can be used without requiring your forgotten or missing password,” and that this method is available only for password reset. In practice, this alternate address is typically a personal or external email (for example, Gmail), so using an external email to authenticate SSPR is valid.

SSPR can also use the Microsoft Authenticator app as an authentication method. Microsoft documents that Authenticator push notifications, including number matching, are supported for several scenarios, explicitly listing self-service password reset (SSPR) among them. This means a push notification to the app on the user’s device can be used to verify identity during SSPR.

Finally, SSPR is designed for situations where the user cannot sign in. Official SSPR process descriptions explain that users start from the “Can’t access your account?” or password-reset page, provide their username, and then use their registered methods to prove identity. They do not need to be already authenticated to Azure AD; SSPR exists precisely to recover access when sign-in fails.