Here’s what the exam actually covers and how I’d approach studying it.

What you’re actually being tested on

The exam breaks down roughly like this:

Security and compliance concepts make up about 10–15% of the exam. This section covers foundational ideas — Zero Trust, defense in depth, the shared responsibility model, how encryption works at a conceptual level, data residency and sovereignty. If you’ve done AZ-900, some of this will be familiar. If you haven’t, spend real time here because these concepts underpin everything else in the exam.

Microsoft Entra (the identity section) is the heaviest, around 25–30%. This covers Azure Active Directory (now officially called Microsoft Entra ID), authentication vs. authorization, MFA, Conditional Access policies, Privileged Identity Management, and Identity Governance. If you’ve worked in Azure at all, parts of this will feel like revision. If not, this section needs the most time.

Microsoft security solutions takes up 35–40% — the biggest chunk. This is where you learn the Defender product family, Microsoft Sentinel, and Azure’s network security tools. It’s broad.

Compliance solutions round out the remaining 20–25%. Microsoft Purview, sensitivity labels, data loss prevention, eDiscovery, Insider Risk Management.

The parts that caught me off guard

The Defender family is genuinely confusing at first.
There are multiple products all called “Defender for [something]” and they protect different things. Defender for Endpoint covers devices. Defender for Office 365 covers email and Teams. Defender for Cloud covers Azure workloads. Defender for Identity covers on-premises Active Directory. And Microsoft Defender XDR is the unified portal that ties them together.

The exam loves scenario questions in this area. It’ll describe a problem — say, an organization is seeing suspicious sign-in activity from compromised on-prem AD accounts — and you need to pick the right Defender product. I got a few of these wrong in practice until I sat down and properly mapped each product to what it protects.

Purview and Sentinel sound similar and do completely different things.
Purview is about compliance and data governance — classifying data, applying sensitivity labels, enforcing retention policies, running eDiscovery. Sentinel is a SIEM/SOAR — it collects security logs, detects threats, and can trigger automated responses. They sit in different parts of the Microsoft admin portals and serve different teams. The exam will test whether you know the difference.

Conditional Access has a specific structure worth knowing. It’s built around assignments (who the policy applies to, what apps or resources, what conditions like location or device state) and access controls (grant access, block, or require MFA). Also important: Conditional Access requires Azure AD Premium P1 or above. That licensing detail shows up in questions.

How I’d study for it now

I’d spend the first week on concepts and identity. The Microsoft Learn SC-900 learning path is free and covers everything — it’s a bit dry but thorough. Do the identity section twice if it’s new to you. It’s the largest part of the exam and the one where people tend to lose the most points.

In the second week I’d focus on the Defender products and Purview. For the Defender section specifically, I’d draw out a simple table — product name, what it protects, which portal it lives in — and refer back to it while doing practice questions. That repetition is what made it stick for me.

I used [MsCertQuiz.com](https://mscertquiz.com) for practice questions. The SC-900 bank has 500 questions. I started in practice mode (explanations after each question) and switched to exam simulation mode in the final three days. My first timed attempt came in around 71%. By day 13 I was consistently hitting 82–85%, which felt like a solid buffer before the real exam.

The actual exam was 44 questions and I had time to go back and reconsider about six of them. I passed.

Is it worth doing

For most people in IT or adjacent roles, yes. Security literacy has become a basic expectation in a lot of organizations, and SC-900 gives you a structured way to build it. Even if you’re not going into a security-specific role, understanding Zero Trust principles, identity governance, and compliance frameworks makes you more useful in almost any technical team.

It’s also the natural starting point for the security certification track if you want to go further. From SC-900, the next steps are SC-300 (Identity and Access Administrator) for identity-focused work, AZ-500 (Azure Security Engineer) for hands-on Azure security, or SC-200 (Security Operations Analyst) if you’re heading toward a SOC role.

The exam costs $165. The study materials don’t need to cost much. Microsoft Learn is free, John Savill has a solid SC-900 cram video on YouTube, and a practice question subscription runs less than $10. The exam voucher is the main expense.

SC-900 practice questions at MsCertQuiz.com — 500 questions, explanations included, practice and exam simulation modes.

Imagine this: a client of yours receives an email from your exact email address. Your name. Your domain. Your signature.

The email asks them to wire money to a new account, or click a link to “verify” their invoice. They trust it completely — because it looks exactly like you.

You never sent it.

This is email spoofing. It’s not a theoretical risk. It happens every day to businesses of every size, and most owners don’t find out until a client calls them confused, angry, or out of money.

The worst part? In most cases, the fix is three DNS records you’ve probably never heard of.

WHY ANYONE CAN FAKE YOUR EMAIL ADDRESS RIGHT NOW

Email was invented in the 1970s. Trust wasn’t built into it. The “From” field in an email is just a text field — there’s nothing in the original protocol that forces it to match who actually sent the message.

For decades, this wasn’t a huge problem. Then the internet got crowded with bad actors.

Today, any spammer with a basic mail server can craft an email that says it’s from ceo@yourcompany.com and send it to your clients, your employees, or your bank. Your mail server never touches it. You get no notification.

The email industry eventually built three defensive standards to fix this: SPF, DKIM, and DMARC. They work together. When configured correctly, they tell the world’s mail servers “only accept email from our domain if it passes these checks — reject or quarantine everything else.”

Most businesses have none of them set up properly.

THE THREE RECORDS THAT ACTUALLY PROTECT YOU

SPF: The Guest List

Sender Policy Framework is a DNS record that lists which mail servers are allowed to send email on behalf of your domain.

Think of it as a guest list at a venue. When an email arrives claiming to be from yourcompany.com, the receiving mail server checks your SPF record: “Is this server on the list?”

A valid SPF record looks something like this in your DNS:

v=spf1 include:_spf.google.com include:sendgrid.net ~all

That says: Google Workspace and SendGrid are allowed. Everyone else gets a soft fail (~all) or hard fail (-all).

Common SPF problems:
- No SPF record at all (anyone can send as you)
- Too many DNS lookups (SPF has a 10-lookup limit — exceed it and the whole record fails)
- ~all instead of -all (soft fail instead of hard fail — a weak boundary)
- Missing a third-party sender like Mailchimp or HubSpot

DKIM: The Signed Seal

DomainKeys Identified Mail attaches a cryptographic signature to every email your servers send. The receiving server uses your public key (stored in DNS) to verify the signature is genuine.

If someone intercepts your email and modifies it, or fabricates a new email entirely, the signature won’t match. The email fails DKIM.

DKIM is the closest thing email has to a tamper-evident seal. It proves the message genuinely came from a server you control.

The tricky part: every email service you use (Google Workspace, Microsoft 365, Mailchimp, HubSpot, SendGrid) needs its own DKIM key published in your DNS. If you’ve added sending services over the years without updating DKIM, those channels are unprotected.

DMARC: The Policy That Ties It Together

SPF and DKIM tell mail servers what to check. DMARC tells them what to do with the result.

Without DMARC, a mail server might detect that an email failed SPF and DKIM — and deliver it anyway. DMARC lets you set a policy:

- p=none — Monitor only. Don’t reject anything. Just send me reports.
- p=quarantine — Move failing emails to spam.
- p=reject — Block failing emails entirely.

Here’s where most businesses get stuck. DMARC also requires alignment — the “From” domain in the email must match the domain used in SPF or DKIM checks. This is what closes the spoofing loophole.

A spoofed email using your domain will almost always fail alignment. With p=reject in place, it gets blocked before reaching your client’s inbox.

The problem? Globally, less than 40% of domains have a DMARC record at all. Of those that do, the majority are set to p=none — which means monitor-only. It’s the DNS equivalent of a smoke alarm with no sprinklers.

WHY “I’LL GET TO IT LATER” IS EXPENSIVE

Business Email Compromise (BEC) — where attackers impersonate executives or vendors — cost businesses over $2.9 billion in reported losses in 2023 alone, according to the FBI. It’s consistently the highest-loss category of cybercrime.

Your client doesn’t need to be technically unsophisticated to fall for it. They’re busy. The email looks legitimate. They act.

By the time it’s discovered, money is gone and trust is damaged — sometimes irreparably.

Contrast that with the fix: three DNS records, about 30 minutes of setup, and zero ongoing cost.

WHAT DOES YOUR DOMAIN LOOK LIKE RIGHT NOW?

Most business owners genuinely don’t know. They set up email years ago, added a few services, and never revisited the DNS.

Here’s what I’d do first: check your current score before touching anything.

EmailAudit (https://emailaudit.co) runs a free check across SPF, DKIM, DMARC, and 12 major email blacklists. It gives you a 0–100 security score with a letter grade, and flags the specific issues in plain English — no DNS jargon.

You’ll see exactly what’s misconfigured, what’s missing, and what to fix first. It takes about 30 seconds and requires no account.

If you want more detail, there’s a free PDF audit report that includes a prioritised fix list you can hand directly to your IT person or hosting provider.

FIXING IT: THE PRACTICAL PATH

Once you’ve run your check, here’s the order of operations:

1. Fix or add SPF first.
Start with -all (hard fail) if you’re confident about your sending sources. If you’re not sure what services send on your behalf, start with ~all and tighten it once you know.

2. Enable DKIM for every sender.
Log in to Google Workspace, Microsoft 365, Mailchimp, HubSpot — whichever services you use — and find their DKIM setup guide. Each will give you a DNS record to add. Add them all.

3. Start DMARC at p=none.
Add a DMARC record with a monitoring-only policy first. Include a rua tag pointing to an email address you check — you’ll start receiving aggregate reports showing who’s sending as your domain.

v=DMARC1; p=none; rua=dmarc@yourcompany.com

4. After two weeks, review the reports.
Check for any legitimate senders you missed in SPF or DKIM. Fix them.

5. Escalate to p=quarantine, then p=reject.
Once you’re confident all legitimate email is passing, move your DMARC policy up. p=reject is the goal.

A NOTE ON BLACKLISTS

There’s one more thing worth checking: whether your domain or sending IP has already been listed on email blacklists.

If you’ve ever had a spam complaint, a compromised account, or a misconfigured mail server, you may be on one or more blacklists — which means your legitimate emails are being filtered or blocked, often silently.

Blacklist removal processes vary by provider. Some are automatic if you clean up the source. Others require a manual delisting request. The first step is knowing you’re listed.

THE BOTTOM LINE

Your domain’s email reputation affects every email you send: sales outreach, invoices, support replies. And your clients and employees are only protected from impersonation if your DNS records are configured correctly.

Neither of those things requires expensive software or a security consultant. It requires understanding three acronyms and spending 30 minutes in your DNS panel.

Check your domain first. Know what you’re working with. Then fix it — in order, one step at a time.

Check your domain free at EmailAudit → https://emailaudit.co

No account. No credit card. Results in 30 seconds.

— -

Have questions about SPF, DKIM, or DMARC setup? Drop them in the comments.

Here’s how I’d think through it.

— -

They cover completely different things

This is the part most people gloss over. AZ-900 and MS-900 are both “Microsoft fundamentals” exams, both cost $165, both are entry-level. But they test knowledge of entirely different products.

AZ-900 is about Azure — the cloud infrastructure platform. You’re learning about virtual machines, storage accounts, networking, how cloud pricing works, what an SLA means, how Microsoft manages identity at scale. It’s infrastructure-focused and moderately technical, even at the fundamentals level.

MS-900 is about Microsoft 365 — Teams, SharePoint, Exchange, OneDrive, Intune. If you’ve spent time as an end-user or admin of these products, parts of the exam will feel familiar. The tricky bits are licensing tiers and the compliance/governance features that most people never touch day-to-day.

The short version: AZ-900 is about the platform Microsoft builds on. MS-900 is about the products millions of people use every day.

— -

So which one is right for you

If your job involves managing or supporting the Microsoft 365 environment — user accounts, Teams troubleshooting, SharePoint permissions, email administration — MS-900 directly reflects what you do. It’ll feel relevant while you study, and it leads naturally to MD-102 and MS-102 if you want to go deeper in that direction.

If your job is more technical — development, infrastructure, networking, anything involving actual cloud resources — AZ-900 is the right call. It’s also the better choice if you’re not sure what direction you want to go, because the Azure certification track is much broader. AZ-900 leads to AZ-104 (admin), AZ-204 (developer), AZ-500 (security), AZ-305 (architect). MS-900’s track is narrower.

My colleague took MS-900. She passed in 10 days. It was the right call for her role. A developer friend of mine who asked the same question six months earlier took AZ-900, then AZ-104, and just got a job as a cloud admin. Different paths.

— -

A note on difficulty

Neither is especially hard, but they’re hard in different ways.

AZ-900 has more abstract concepts — things like the shared responsibility model, composite SLAs, the difference between CapEx and OpEx. If you’ve never worked in IT before, some of this takes a while to click.

MS-900 is more product-knowledge heavy. If you’ve been using M365 products for years, the productivity sections feel easy. But the licensing and compliance sections can surprise people. Microsoft’s licensing tiers are genuinely confusing, and the exam tests them more than you’d expect.

Study time for either: two weeks is enough if you’re putting in an hour or two a night. Some people do it faster.

— -

Can you just do both

Yes, and it’s not a bad idea. They complement each other. If you work in an organization that runs on Microsoft’s ecosystem (most do), having both shows you understand the full picture — the infrastructure and the productivity layer sitting on top of it.

Some people going for MS-102 (M365 Administrator Expert) actually find it helpful to have AZ-900 under their belt first, because MS-102 touches Azure AD extensively and AZ-900 gives you context for that.

— -

For practice questions

I used MsCertQuiz.com for both. The practice mode shows explanations right after each question which helps you understand where your gaps are, rather than just memorizing answers. The exam simulation mode is good for the final few days before you book — aim for 80% consistently before sitting the real thing.

— -

The decision really does come down to your current role and where you want to go. If you’re still not sure, go with AZ-900. The career path from there is longer and the demand for Azure skills continues to grow. But if M365 is your world, MS-900 is the more immediately useful cert and you’ll likely find it easier to study.

Either way, just pick one and start. The worst outcome is spending another month deciding instead of studying.

— -

*MsCertQuiz.com has question banks for both AZ-900 and MS-900, plus SC-900, AZ-104, and several others if you end up going further down the certification path.*

Fourteen days later I passed. 870 out of 1000.

I’m not writing this to brag — 870 isn’t spectacular and I got a few questions that genuinely stumped me. I’m writing it because I spent the first three days doing completely the wrong things, and if I’d found a post like this, I would have saved that time.

— -

The mistake I made first

I opened the Azure portal and started clicking around. Free account, spun up a VM, poked at storage accounts. Felt productive.

It was a waste of time. AZ-900 doesn’t test whether you can do things in Azure. It tests whether you understand *why* Azure services exist and how they relate to each other. Those are genuinely different things. You can spend a week in the portal and still fail the conceptual questions.

— -

What actually worked — week one

Once I figured out I was studying wrong, I switched to Microsoft Learn. The official AZ-900 learning path is free and it’s actually good. Not exciting, but thorough. I did the whole thing across four days, maybe 90 minutes each evening after work.

The knowledge checks at the end of each module are worth doing properly. Don’t just click through them. If you get something wrong, reread that section before moving on.

Partway through week one I found John Savill’s AZ-900 study cram on YouTube. It’s a single video, about three hours. I watched it at 1.5x over two evenings. He draws everything out as he explains it which helped me a lot — seeing how Resource Groups sit inside Subscriptions sit inside Management Groups, visually, made it click in a way that reading didn’t.

By the end of week one I could explain the shared responsibility model without looking it up, and I had a rough sense of the difference between IaaS, PaaS, and SaaS that wasn’t just memorized definitions.

— -

Week two was all practice questions

This is the part that actually got me ready to pass.

I used [MsCertQuiz.com](https://mscertquiz.com) for practice. I started in practice mode — it shows you the answer and explanation right after each question, so you’re constantly getting feedback. When I got something wrong I’d read the explanation, then go back to the Microsoft Learn module for that topic and reread the relevant bit. Not the whole module, just the part I was fuzzy on.

The questions that kept catching me out early on: composite SLAs (combining services lowers your availability, which is counterintuitive), the difference between Azure Policy and RBAC, and anything involving the TCO calculator vs. the Pricing calculator. Those two calculators have different purposes and the exam will make you distinguish between them.

Around day 10 I switched to exam mode — timed, no feedback until the end. First attempt I scored 74%. Not great. I went back and drilled the governance section specifically because that’s where I kept losing points.

Day 13, scored 83% in exam mode. I booked the exam for the next morning.

— -

The exam itself

It was 42 questions. I finished in about 30 minutes and spent another 10 going back through the ones I’d flagged.

The questions felt fair. Nothing tricky for the sake of being tricky. A few scenario questions where you pick the right Azure service for a given situation — those are straightforward if you’ve done practice questions in that format.

I didn’t feel rushed. The 45-minute time limit is generous.

— -

What I wish I’d known going in

The exam is heavier on governance and pricing than I expected. Management Groups, Subscriptions, Resource Groups, Azure Policy, Cost Management — know this stuff well.

It’s lighter on actual service configuration than I feared. You don’t need to know how to set up a VNet or configure a load balancer. That’s AZ-104 territory.

The shared responsibility model comes up a lot. Not just once — across multiple questions in different forms. Know exactly who owns what in each service model (on-prem, IaaS, PaaS, SaaS).

— -

What I spent

Microsoft Learn: free. John Savill’s video: free. MsCertQuiz for the practice questions: around $9. Exam voucher: $165.

The exam is the expensive part. The study materials don’t need to be.

— -

If you’re starting from zero and have two weeks, this is the path that worked for me. Concepts first, practice questions second, exam mode to verify you’re ready. Don’t spend time in the Azure portal until after you’ve passed — that’s what AZ-104 is for.

Good luck.

— -

*MsCertQuiz.com also has question banks for MS-900, SC-900, AZ-104, and a few others if you’re continuing the certification path.*

Why Microsoft Certifications Are Valuable

Microsoft certifications are recognized worldwide and validate real-world skills. Earning a certification can help you:

• Advance your IT career and qualify for better roles
• Boost your salary potential in cloud or IT security roles
• Stand out in a competitive job marke
• Build confidence in your technical knowledge

But passing these exams requires more than memorization — it requires practice and application.

The Limitations of Passive Learning

Many learners rely heavily on:

• Video courses
• Microsoft documentation
• Notes or flashcards

While these methods provide knowledge, they are mostly passive. Microsoft exams often test how well you apply your knowledge in real-world scenarios, not just recall facts. That’s why Microsoft practice quizzes are essential.

How Practice Quizzes Boost Your Microsoft Exam Success

Using quizzes designed for Microsoft certifications offers several benefits:

1. Identify Knowledge Gaps
Practice quizzes quickly reveal which topics you understand and which need more study.

2. Reinforce Active Recall
Answering questions actively strengthens memory and improves long-term retention.

3. Simulate Exam Conditions
High-quality quizzes mimic the structure and difficulty of official Microsoft exams, reducing surprises on exam day.

4. Build Confidence
Consistent quiz practice increases confidence and reduces exam anxiety.

Choosing the Right Microsoft Practice Quiz Platform

When selecting a platform, look for:

• Questions aligned with official Microsoft exam objectives
• Clear explanations for right and wrong answers
• Coverage of multiple certifications, from AZ-900 to SC-900
• A distraction-free and easy-to-use interface

MsCertQuiz.com is one platform that focuses exclusively on Microsoft certification practice. With up-to-date quizzes for all major Microsoft exams, it’s an excellent resource for anyone preparing for their next certification.

Best Practices for Using Microsoft Practice Quizzes

To maximize the effectiveness of your quizzes:

• Take a quiz before studying to gauge your baseline knowledge
• Review explanations thoroughly, especially for incorrect answers
• Retake quizzes after studying to measure improvement
• Focus on weak areas instead of just aiming for high scores

Consistency is key. Regular practice helps turn knowledge into practical skills.

Microsoft certification exams are designed to test practical understanding, not just theory. Using Microsoft practice quizzes bridges the gap between learning and application, making them one of the smartest tools for exam preparation.

If you’re serious about passing a Microsoft certification exam, consider using MsCertQuiz.com to test your knowledge, identify weak areas, and boost your confidence before exam day.

At first glance, they seem tempting. Why spend weeks studying when you can just memorize answers?

But here’s the uncomfortable truth: memorizing exam dumps is one of the worst strategies for passing Microsoft certification exams — and an even worse strategy for your long-term career.

Let’s look at why this approach fails, what Microsoft exams actually test, and what works far better instead.

What Are Exam Dumps — And Why People Use Them?

Exam dumps are collections of alleged real exam questions and answers, usually shared without authorization. Candidates often turn to them because of:

• Time pressure
• Information overload from official documentation
• Fear of failing, especially on a first attempt

These concerns are understandable. Microsoft exams cover a wide range of topics, and preparation can feel overwhelming. But shortcuts come with serious downsides.

Why Memorizing Exam Dumps Doesn’t Work

1. Microsoft Exams Are Designed to Defeat Memorization

Modern Microsoft exams are scenario-based, not recall-based.

Instead of asking simple factual questions, they present real-world situations and ask you to choose the best solution based on constraints like security, cost, scalability, and manageability.

This means:

• Questions are randomized
• Scenarios are reworded
• Answer choices are intentionally similar

Memorized answers quickly fall apart when the context changes.

2. Dumps Don’t Teach You Why an Answer Is Correct

Passing a Microsoft exam requires understanding why a solution works, not just recognizing keywords.

Exam dumps provide answers without explanations, which leads to:

• Guessing when wording changes
• Difficulty eliminating incorrect options
• Panic during longer scenario questions

Without understanding, confidence disappears the moment something looks unfamiliar.

3. Knowledge Retention Is Almost Zero

Even candidates who pass using dumps often realize afterward that they can’t confidently explain the concepts.

Microsoft certifications are meant to validate practical skills. If you can’t apply what you studied in real situations or explain it in an interview, the certification loses its value.

4. Ethical and Professional Risks

Microsoft explicitly discourages the use of exam dumps. Using them can:

• Violate exam policies
• Lead to certification revocation
• Damage professional credibility

In IT, trust and integrity matter just as much as technical skills.

What Microsoft Certification Exams Actually Test

To prepare effectively, you need to understand the purpose behind these exams.

Microsoft exams typically assess:

• Conceptual understanding
• Decision-making in real scenarios
• Best practices, not edge-case solutions
• Microsoft-recommended approaches

This applies whether you’re preparing for AZ-900, SC-900, MD-102, or associate-level role-based certifications.

What Works Instead: A Smarter Preparation Approach

1. Start With the Official Exam Objectives

Every Microsoft exam has a published skills outline. This document tells you exactly what is measured and how heavily each area is weighted.

Use it as a checklist.
This prevents wasted time studying topics that won’t appear on the exam.

2. Use Microsoft Learn — Selectively

Microsoft Learn is an excellent resource, but trying to complete everything often leads to burnout.

A better approach:

• Skim to understand the big picture
• Deep dive only where you feel weak
• Focus on use cases and decision-making

Understanding why a service exists matters more than memorizing definitions.

3. Reinforce Learning With Targeted Practice Questions

Practice questions are useful only when they test understanding, not recall.

Short, topic-focused quizzes help you:

• Identify weak areas early
• Get comfortable with exam-style wording
• Practice choosing the best solution, not just a correct one

Some platforms, such as MsCertQuiz, offer micro-quizzes aligned with Microsoft exam objectives. When used correctly, these quizzes act as feedback tools, helping you validate what you actually understand rather than what you can memorize.

The key is to review explanations carefully and focus on reasoning.

4. Think Like an Administrator, Not a Student

Microsoft exams reward candidates who ask:

• What would Microsoft recommend here?
• Which option is most secure and manageable?
• What works best in a real production environment?

When reviewing questions, always analyze why the correct answer is right and why the others are wrong.

5. Use a Balanced Learning Mix

A practical preparation plan might include:

• Official documentation
• Concept-focused articles or videos
• Light hands-on labs
• Targeted practice quizzes

You don’t need every resource available — you need the right combination.

Final Thoughts

Exam dumps promise speed, but they deliver fragile results.

If your goal is only to pass an exam, shortcuts might look appealing.
If your goal is real understanding, confidence, and long-term career growth, they’re a dead end.

Understanding concepts, practicing intelligently, and reinforcing weak areas takes more effort — but it works. And it lasts.