MCS
Microsoft Certified: Security, Compliance, and Identity Fundamentals (SC-900)
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Cheat sheet
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ExploreKey terms
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Give each week a clear focus.
ExploreCommon mistakes
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ExploreCase studies
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ExploreExam-day guide
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ExploreAbout this exam
SC-900, officially Microsoft Certified: Security, Compliance, and Identity Fundamentals, is an entry-level credential that confirms you can describe how Microsoft's cloud security stack fits together rather than configure it. It suits people moving into security, compliance, or identity work; sales and pre-sales staff who need credible vocabulary; IT generalists whose duties now touch Microsoft Entra, Defender, or Purview; and students building a first certification path toward the associate-level security exams. The exam is organized into four areas: foundational concepts of security, compliance, and identity; Microsoft Entra capabilities such as authentication, conditional access, and identity governance; Microsoft security solutions spanning Defender products, Secure Score, and Sentinel; and compliance solutions including Purview, data classification, retention, and audit. Expect a multiple-choice exam with some multiple-response, drag-and-drop, hotspot, and case-study style items - Microsoft documents the exact format and item types on its exam page. Preparation works best in layers: read the official skills outline and map each objective to a product, then use Microsoft Learn modules and a free trial tenant to see the concepts in a portal. Practise explaining each service in one sentence - why it exists and which problem it solves - because the exam rewards accurate conceptual distinctions far more than deep configuration knowledge. Microsoft publishes current scheduling, pricing, and policy details on its certification site.
What you'll study
About MCS preparation
What is the exam format?
It is a computer-based proctored exam delivered at test centers or online. Microsoft's exam page lists the item types in use; expect mostly multiple choice, with some multiple-response, drag-and-drop, hotspot, and case-study items. Read each question's instruction carefully, since multiple-response items tell you how many answers to select.
How long is the exam and how many questions?
Microsoft publishes the current seat time and question count on the official exam page and in the scheduling flow; these details change, so check there rather than relying on secondhand reports. As a practical tip, case-study items usually come first and are not timed separately, so budget your remaining time for the standalone questions.
How hard is SC-900?
It is a fundamentals exam, so difficulty comes from breadth rather than depth. You will not be asked to write policies or configure tenants. The common trap is that many products have overlapping purposes - Entra ID Protection versus Conditional Access, Defender for Cloud Apps versus Defender for Endpoint - so the real work is learning the boundaries between services.
What is the passing score and what does it cost?
Microsoft sets the passing score and does not publish a simple percentage; scores are scaled and reported on your score report after the exam. Pricing varies by country and currency. Both the current fee and any scoring details are published by Microsoft on its certification and exam pages, so confirm them there before booking.
What happens if I fail - can I retake it?
Yes, retakes are allowed, but Microsoft applies waiting periods and a fee for each attempt. The exact retake policy and waiting time are published on Microsoft's certification site and shown when you schedule. Use the score report's per-domain breakdown to target the weakest area before rebooking rather than rereading everything.
In what order should I study the four domains?
Start with domain 1 for shared vocabulary - the CIA triad, authentication versus authorization, and the difference between a tenant and a subscription. Then do Entra, because identity concepts underpin Conditional Access and many Defender scenarios. Security solutions come next, and compliance last, since Purview assumes you understand identities, data locations, and audit trails.
Do I need hands-on experience or a lab tenant?
Not strictly, but a free Microsoft 365 or Azure trial tenant makes the concepts stick. Creating a user, assigning a role, and looking at sign-in logs turns abstract terms into concrete objects. Even thirty minutes clicking through the Entra and Purview portals will help you answer scenario questions about which tool addresses a given risk.
What are the most common failure modes?
Candidates lose points by memorizing product names without their purpose. Typical confusions include Zero Trust principles versus a specific product, encryption at rest versus in transit, and retention labels versus retention policies. Another frequent error is skimming questions that ask for the best answer when two options are technically true but only one matches the scenario.
Does SC-900 expire, and does it lead anywhere?
Fundamentals certifications do not require the annual renewal that associate and expert certifications do; Microsoft states the current policy on its site. SC-900 is a good stepping stone to SC-200, SC-300, or SC-400, each of which goes deeper into security operations, identity administration, or compliance administration respectively.
Is this an official Microsoft study resource?
No. This is independent study material and is not affiliated with or endorsed by Microsoft. Always treat the official skills outline as the source of truth for what is covered, and use Microsoft Learn alongside third-party practice to check your understanding rather than to predict actual exam questions.