MS-900 Describe Microsoft 365 apps and services Practice Question
Which TWO Microsoft 365 services are primarily used for enterprise social networking and communication within an organization?
⚠ Common exam trap
Microsoft often tests the distinction between collaboration tools by making SharePoint or Exchange Online seem like social networking options, but the trap here is confusing document management or email with enterprise social networking, which requires persistent, community-driven communication features.
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 correct because it serves as the primary hub for persistent chat, meetings, and collaboration, integrating enterprise social networking features such as channels, @mentions, and threaded conversations. Microsoft Viva Engage (formerly Yammer) is correct because it provides a dedicated enterprise social network for broad organizational communication, communities, and knowledge sharing, distinct from Teams' more team-focused interactions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Microsoft Teams
Why this is correct
Microsoft Teams is the correct answer because it is the primary hub for persistent, threaded chat and channel-based communication in Microsoft 365. Teams allows users to send direct messages, create group conversations, and collaborate in channels organized by project or topic, all while integrating with Office apps and meeting features. Its real-time messaging capabilities directly fulfill the 'communication' requirement for enterprise collaboration, distinct from document storage or video hosting.
- ✓
Microsoft Viva Engage
Why this is correct
Microsoft Viva Engage is also correct because it is the enterprise social network (formerly Yammer) that provides organization-wide communities, announcement feeds, and conversation threads for cross-team communication. Viva Engage is designed for broadcasting messages to large groups, fostering open discussions, and enabling leadership to engage with employees, which complements Teams' more focused chat-and-channel collaboration. Its 'social network' model makes it a second distinct service primarily for communication.
- ✗
Microsoft SharePoint
Why it's wrong here
Microsoft SharePoint is incorrect for this question because it is a content management and document collaboration platform, not a communication service. SharePoint stores files, manages metadata, and provides secure intranet sites, but its primary purpose is structured content storage and sharing rather than real-time messaging or social conversation. While SharePoint can host discussion boards, those are legacy features and not its core communication role, so it does not qualify as a service primarily used for communication.
- ✗
Microsoft Stream
Why it's wrong here
Microsoft Stream is incorrect because it is an enterprise video service for uploading, organizing, and sharing recorded videos, such as town halls or training content. It enables asynchronous viewing and commenting on videos, but it does not provide real-time chat, messaging, or social networking capabilities. Stream's focus is on video lifecycle management, not on driving two-way conversational communication, which is why it is not a primary communication service.
- ✗
Exchange Online
Why it's wrong here
Exchange Online is incorrect because it is an email and calendaring service, not a real-time or social communication platform. While email is a form of asynchronous communication, Exchange Online's core function is mail transport, mailbox storage, and calendar scheduling, and it lacks the persistent chat channels, presence, and enterprise social features that Teams and Viva Engage offer. Microsoft 365 classifies Exchange Online under messaging infrastructure rather than as a collaboration communication service in the same category.
Go deeper
Related to this question
Learn chapter
Microsoft Viva Employee Experience Platform
Key term
Yammer
Yammer is Microsoft's enterprise social networking platform that connects employees across an organization for collaboration, knowledge sharing, and communication.
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.
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