MS-900 Describe Microsoft 365 apps and services Practice Question
A multinational corporation uses Microsoft 365 E5. The IT team needs to provide users with a single integrated workspace that combines chat, file sharing, online meetings, and app integration, while also allowing external guests to collaborate on projects. Which Microsoft 365 service should they deploy?
⚠ Common exam trap
The trap here is selecting SharePoint Online for collaboration because it handles files and external sharing, but it lacks integrated chat and meetings, which are central to the requirement.
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 service because it delivers a unified workspace with chat, file sharing, online meetings, and app integration, and it supports guest access for external collaboration. SharePoint Online, Exchange Online, and Yammer each provide only a subset of these capabilities and cannot serve as the integrated hub described.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
SharePoint Online
Why it's wrong here
SharePoint Online is a platform for document management, sites, and lists, and it supports external sharing. However, it does not natively provide persistent chat, online meetings, or a unified workspace that integrates chat and meetings alongside files. While it can be used for collaboration, it lacks the integrated chat and meeting experience that Teams provides.
- ✗
Exchange Online
Why it's wrong here
Exchange Online is a cloud-based email and calendaring service. It does not provide chat, file sharing, online meetings, or app integration. While it supports external recipients via email, it is not a collaboration workspace. It cannot fulfill the requirement for an integrated workspace with chat, meetings, and guest collaboration, so it is not the correct choice.
- ✓
Microsoft Teams
Why this is correct
Microsoft Teams provides a hub for teamwork that integrates chat, file sharing, online meetings, and third-party and Microsoft app integration. It supports guest access, allowing external partners to collaborate in teams and channels. This matches the requirement for a single integrated workspace with external collaboration capabilities, making Teams the appropriate service.
- ✗
Yammer
Why it's wrong here
Yammer (now Viva Engage) is an enterprise social network for company-wide conversations and communities. It does not provide file sharing, online meetings, or app integration in a unified workspace. While it supports external guests in some configurations, it is not designed as a primary collaboration hub for projects with integrated chat, meetings, and files, so it does not meet the requirements.
Go deeper
Related to this question
Learn chapter
Microsoft Entra External Identities (B2B)
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
Yammer
Yammer is Microsoft's enterprise social networking platform that connects employees across an organization for collaboration, knowledge sharing, and communication.
About these practice questions
This MS-900 question is part of Courseiva's 794-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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.