This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Yammer
Why wrong: Yammer is an enterprise social network, not a collaboration hub.
SharePoint Online
Why wrong: SharePoint provides document management but lacks instant messaging and app integration.
OneNote for Windows 10
Why wrong: OneNote is for note-taking, not a comprehensive collaboration hub.
Microsoft Teams
Teams integrates chat, files, and apps in a single hub.
Answer choices
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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 network, not a collaboration hub.
SharePoint Online
Why it's wrong here
SharePoint provides document management but lacks instant messaging and app integration.
OneNote for Windows 10
Why it's wrong here
OneNote is for note-taking, not a comprehensive collaboration hub.
Microsoft Teams
Why this is correct
Teams integrates chat, files, and apps in a single hub.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often 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.
Detailed technical explanation
Microsoft Teams uses the Microsoft Graph API to unify chat, calendar, files, and third-party app data, allowing developers to create custom tabs and connectors that embed external services directly into channels. Under the hood, Teams leverages SharePoint Online for file storage and Exchange Online for chat history, ensuring compliance and eDiscovery capabilities. In a real-world school scenario, a teacher could add a third-party quiz app as a Teams tab, allowing students to launch quizzes without leaving the collaboration environment.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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FAQ
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
The correct answer is: 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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