MS-900 Study Guide 2026: Complete Microsoft 365 Fundamentals Exam Prep
Everything you need to pass the Microsoft 365 Fundamentals exam — exam objectives, domain breakdown, study plan, and what actually shows up on test day.
Quick Summary
- • MS-900 is a Fundamentals-level exam with 40–60 questions, 45 minutes, 700/1000 passing score
- • Covers 3 domains: Microsoft 365 services, identity/security/compliance, pricing/support
- • Most candidates need 2–4 weeks of preparation
- • Exam cost: $165 USD
What is the MS-900 Exam?
MS-900 is Microsoft's foundational certification for Microsoft 365. It validates that you understand cloud concepts, the Microsoft 365 productivity and collaboration tools, identity and security capabilities, and how Microsoft 365 is licensed and supported.
Unlike more technical exams, MS-900 is designed for business decision-makers, IT generalists, and non-technical staff who work with Microsoft 365 environments or make purchasing decisions. No hands-on lab configuration is required.
| Detail | Information |
|---|---|
| Exam Code | MS-900 |
| Credential Earned | Microsoft 365 Fundamentals |
| Number of Questions | 40–60 questions |
| Time Limit | 45 minutes |
| Passing Score | 700 out of 1000 |
| Exam Price | $165 USD |
| Exam Level | Fundamentals |
| Prerequisites | None |
MS-900 Exam Domains & Weightings
The MS-900 exam covers three domains. The weightings are roughly equal, which means no single area can be ignored.
Domain 1: Microsoft 365 Apps and Services
~33%The largest and most product-knowledge-heavy domain. You need to understand the purpose and capabilities of:
- • Microsoft 365 productivity apps: Teams, Outlook, SharePoint, OneDrive, Word, Excel, PowerPoint
- • Collaboration and communication: Teams meetings, channels, chat vs. email use cases
- • Endpoint management: Microsoft Intune, Windows 365, Azure Virtual Desktop
- • Analytics: Viva Insights, Microsoft 365 admin center reports
- • Cloud vs. on-premises differences and hybrid scenarios
- • Modern lifecycle policy — how Microsoft 365 apps update and stay current
Study tip: Know which app does what. Questions often present a scenario and ask which Microsoft 365 tool best solves it.
Domain 2: Identity, Security, and Compliance
~33%Conceptual understanding of Microsoft's security and compliance features — no deep configuration required:
- • Microsoft Entra ID (Azure AD): identity, authentication, MFA, conditional access concepts
- • Zero Trust model — assume breach, verify explicitly, least privilege access
- • Microsoft Defender products: Defender for Endpoint, Office 365, Identity
- • Microsoft Purview: information protection, data lifecycle management, compliance
- • Compliance Manager, compliance score, and built-in regulatory templates
- • Insider risk management and communication compliance concepts
Study tip: Understand the difference between Microsoft 365 Defender (threat protection) and Microsoft Purview (compliance/data governance).
Domain 3: Microsoft 365 Pricing, Licensing, and Support
~34%Candidates often underestimate this domain. It goes deeper than just knowing plan names:
- • Microsoft 365 subscription plans: Business (Basic/Standard/Premium), Enterprise (E3/E5), F-series (Frontline)
- • Which features are included in which plans (e.g., Purview only in E5/M365 Business Premium)
- • Billing models: per user/month, annual vs. monthly commitment
- • Microsoft 365 admin center capabilities and admin roles
- • Support options: Microsoft 365 admin center support, FastTrack, Microsoft Partners
- • Service Level Agreements and uptime guarantees
Study tip: Memorize which features require E5 vs. E3. Purview advanced compliance, Defender for Identity, and Insider Risk are common exam traps.
Ready to test yourself?
Try 40 Free MS-900 Practice Questions
Scenario-based questions with detailed explanations. No credit card required.
Start Free Practice →How Hard is MS-900?
MS-900 is one of the more accessible Microsoft certifications, comparable in difficulty to AZ-900. Candidates with day-to-day experience using Microsoft 365 apps (Teams, SharePoint, Outlook) often find the first domain straightforward. The main difficulty lies in the licensing/pricing domain and in knowing exactly which security and compliance feature belongs to which product family.
Why candidates fail MS-900
- • Licensing confusion: Not knowing which features require E5 vs. E3 vs. Business Premium catches many candidates off-guard
- • Purview vs. Defender mix-up: Microsoft Purview (compliance/data) and Microsoft Defender (threat protection) are frequently confused
- • Skipping the pricing domain: Candidates focused on technology often neglect the business/licensing domain until it's too late
- • Not reading questions carefully: MS-900 questions often include qualifiers like "at the lowest cost" or "without additional licensing"
4-Week MS-900 Study Plan
This plan assumes 1–1.5 hours of study per day. IT professionals already using Microsoft 365 can compress this to 2 weeks.
Week 1: Microsoft 365 Apps & Services
- Days 1–2: Teams — meetings, channels, live events, webinars, chat vs. email
- Days 3–4: SharePoint Online vs. OneDrive for Business — when to use each
- Days 5–6: Endpoint management — Intune, Windows 365, Co-management concepts
- Day 7: Microsoft 365 admin center tour — user management, service health, reports
Week 2: Identity, Security & Compliance
- Days 1–2: Microsoft Entra ID — MFA, Conditional Access, SSPR, identity protection concepts
- Days 3–4: Microsoft Defender suite — Defender for Endpoint, Office 365, Identity, Cloud Apps
- Days 5–6: Microsoft Purview — sensitivity labels, DLP, retention policies, eDiscovery, Compliance Manager
- Day 7: Zero Trust model deep dive + practice questions on Domain 2
Week 3: Pricing, Licensing & Support
- Days 1–2: Microsoft 365 plan comparison — Business (Basic/Standard/Premium) vs. Enterprise (E3/E5) vs. F1/F3
- Days 3–4: Features by license tier — map each security/compliance feature to its required plan
- Days 5–6: Support channels, SLAs, FastTrack, Microsoft Partner ecosystem
- Day 7: Practice questions focused on licensing scenarios
Week 4: Full Review & Mock Exams
- Days 1–2: Review notes, revisit any weak areas from weeks 1–3
- Day 3: Full 45-minute timed mock exam — identify weak domains
- Days 4–5: Targeted review of any domain below 70%
- Day 6: Second full timed mock exam — aim for 80%+
- Day 7: Light review only. Book the exam if scoring 80%+ consistently.
Best MS-900 Study Resources
1. Microsoft Learn MS-900 Learning Path (Free)
The official Microsoft training covers all three exam domains with interactive modules. Aligned directly to the exam skills outline. This is the single most important resource — complete it before anything else. Estimated time: 6–8 hours.
2. MSCertQuiz Practice Tests
500 MS-900 practice questions covering all three domains with detailed explanations for every answer. Includes scenario-based questions that mirror the real exam format. Use practice mode to learn, then timed exam mode to simulate test day.
Start free MS-900 practice →3. Microsoft 365 Official Documentation
For specific topics like licensing comparisons or feature availability, the official Microsoft 365 documentation is authoritative. Focus on the "Compare Microsoft 365 plans" pages to build a clear map of which features require which license tier.
4. Official MS-900 Exam Skills Outline
Download the exam skills outline from Microsoft. Use it as a checklist — mark each topic as "confident," "review needed," or "unknown." The items marked unknown are your priority study list.
MS-900 Exam Day Tips
Do
- • Read every word — qualifiers like "without additional cost" or "built into the plan" change the answer
- • When unsure between two answers, pick the more specific Microsoft 365 native solution
- • Flag and return to difficult questions — 45 minutes is tight if you overthink early questions
- • For licensing questions, default to Business Premium if the question involves SMB and security features
Don't
- • Don't confuse Microsoft Purview (compliance) with Microsoft Defender (security)
- • Don't forget that Teams is the answer to most collaboration/communication scenario questions
- • Don't assume every security feature requires a separate purchase — many are included in E3/E5
- • Don't change answers unless you have a specific reason — first instincts are usually correct
Ready to Practice MS-900?
500 questions across all 3 domains. Practice mode with explanations + timed exam simulation.
Start Free Practice →Frequently Asked Questions
Is MS-900 worth it?
Yes, especially for non-technical professionals in Microsoft 365 environments. It validates foundational knowledge and serves as a stepping stone to associate-level certs like MS-102. For IT pros, it's a quick credential that often takes less than 3 weeks to prepare.
What is the difference between MS-900 and AZ-900?
MS-900 focuses on Microsoft 365 productivity, collaboration, security, and licensing. AZ-900 focuses on Azure cloud infrastructure and services. Both are Fundamentals-level exams with no prerequisites. If your organization uses Microsoft 365 heavily, start with MS-900. If your work is more infrastructure/cloud, start with AZ-900.
How long does it take to study for MS-900?
Most candidates need 2–4 weeks at 1–1.5 hours per day. IT professionals already using Microsoft 365 tools daily can often prepare in 1–2 weeks. Non-technical candidates should plan for the full 4 weeks, with extra time on the licensing domain.
Can I take MS-900 from home?
Yes. MS-900 is available through Pearson VUE online proctored at home or at a test center. Online requires a quiet room, reliable internet, and a webcam. Most candidates find home proctoring convenient for a fundamentals-level exam.