MS-900 Describe Microsoft 365 apps and services Practice Question
A school uses Microsoft 365 A3 for faculty and staff. They want to create a hub for teachers to share lesson plans, collaborate on documents, and communicate via instant messaging. They also need to integrate with third-party educational apps. Which Microsoft 365 service should they use as the primary platform?
⚠ Common exam trap
A common mix-up: candidates confuse Yammer's social networking features with Teams' real-time collaboration capabilities, or they assume SharePoint alone can fulfill all communication needs, missing the requirement for instant messaging and integrated third-party apps.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Teams
Microsoft Teams is the correct primary platform because it integrates chat, document collaboration (via SharePoint and OneDrive), and third-party app connectors into a single hub. For teachers sharing lesson plans, collaborating on documents, and using instant messaging, Teams provides persistent chat, file sharing, and a rich app ecosystem that supports third-party educational app integration through tabs, connectors, and bots.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Yammer
Why it's wrong here
Yammer is an enterprise social networking service designed for organization-wide discussion threads, communities, and leadership messages, not a unified workspace. Although it offers some collaboration features, it lacks persistent group chat, integrated meetings, and the extensible app platform that define a modern hub. In Microsoft 365, Yammer is a complementary tool, not the place where daily work gets done.
- ✗
SharePoint Online
Why it's wrong here
SharePoint Online is a robust document management and intranet service that handles lists, libraries, version history, and fine-grained permission inheritance, but it does not deliver native instant messaging, video meetings, or a unified activity feed. Teams stores channel files in SharePoint behind the scenes, so SharePoint acts as the back-end data repository rather than the user-facing hub. For a school that wants faculty and staff to chat, meet, and collaborate in one place, SharePoint alone is insufficient.
- ✗
OneNote for Windows 10
Why it's wrong here
OneNote for Windows 10 is a freeform note-taking tool for capturing ideas with rich text, ink, screen clippings, and embedded media, and while those notes can be shared, it has no built-in chat or meeting orchestration. In a Microsoft Teams environment, OneNote appears as a tab or a wiki page within a channel, clearly showing it is an auxiliary service rather than the central aggregator. The question asks for a hub that combines multiple workstreams, which OneNote cannot do.
- ✓
Microsoft Teams
Why this is correct
Microsoft Teams is purpose-built as the collaboration hub in Microsoft 365, combining persistent threaded chat, VoIP and video meetings, file sharing, and third-party app integration in one application surface. Teams uses SharePoint Online for files, Exchange Online for calendar/chat infrastructure, and OneNote for notebook tabs, but it is the orchestrating layer that presents those services cohesively. For a school on A3, Teams gives faculty and staff a single place to transition from chat to meeting to a shared document without switching tools.
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Key term
Microsoft 365
Microsoft 365 is a subscription-based cloud service from Microsoft that combines productivity tools like Office apps with security, device management, and online storage.
Key term
Collaboration
Collaboration in Microsoft 365 refers to the integrated tools and services that enable people to work together in real time, share information, and coordinate tasks from anywhere.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This MS-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MS-900 exam.