Microsoft 365 FundamentalsStudy guide
The fundamentals certification for Microsoft 365 cloud productivity (MS-900).
About Microsoft 365 Fundamentals (MS-900)
Microsoft 365 Fundamentals (MS-900) is a Fundamentals-level certification from Microsoft. This page organizes the exam scope into a 4-chapter, 9-section study guide and lets you check your understanding with exam-style practice questions. A good flow is to read the chapters below in order, then test yourself via "Practice questions."
Exam domains (approximate weighting)
- Cloud concepts~13%
- Microsoft 365 apps and services~49%
- Security, compliance, privacy, and trust~28%
- Pricing, licensing, and support~10%
Weights are approximate guidance for the live exam. Each domain is covered in detail in the chapters and sections below.
Note: This exam has been retired (successor: AB-900).
Official exam information: https://learn.microsoft.com/en-us/credentials/certifications/resources/study-guides/ms-900
1Cloud Concepts
- 1.1Cloud Concepts and Service Models
Understand cloud computing basics, service models (IaaS/PaaS/SaaS), deployment models (public/private/hybrid), and how Microsoft 365 is a SaaS. The starting point for MS-900.
- 1.2Benefits of the Cloud and Pay-as-you-go
Understand the benefits of the cloud—scalability, reliability, security, and cost (CapEx to OpEx)—and the pay-as-you-go model.
2Microsoft 365 Apps and Services
- 2.1Productivity Apps and Services
Understand Microsoft 365’s core productivity services—Office apps (Word/Excel/PowerPoint/Outlook), Exchange Online, SharePoint, and OneDrive.
- 2.2Collaboration and Communication
Understand collaboration centered on Microsoft Teams, employee experience tools like Microsoft Viva, and co-creation tools like Loop and Forms.
- 2.3Device Management and Deployment
Understand device management with Microsoft Intune (MDM/MAM), Windows 365 (Cloud PC), and how Microsoft 365 apps are deployed and updated.
3Security, Compliance, Privacy, and Trust
- 3.1Security in Microsoft 365
Understand identity management with Microsoft Entra ID (SSO, MFA, Conditional Access), threat protection with Microsoft Defender, and Zero Trust in the Microsoft 365 context.
- 3.2Compliance and Trust
Understand the elements supporting trust in Microsoft 365—Microsoft Purview compliance (information protection, data lifecycle), the Service Trust Portal, and data residency.
4Pricing, Licensing, and Support
- 4.1Licensing and Billing
Understand Microsoft 365 licensing (per-user subscriptions), plans/editions, and assigning licenses and managing billing.
- 4.2Support and Service Levels
Understand Microsoft 365 support options, service level agreements (SLA), service health, and lifecycle.