MS-900 Describe Microsoft 365 apps and services Practice Question
A company wants to provide employees with a personal cloud storage solution that syncs files across devices and allows sharing with external partners. Which Microsoft 365 service should they use?
⚠ Common exam trap
Many exam-takers confuse SharePoint Online's team-based document libraries with OneDrive for Business's personal storage, overlooking that the question explicitly asks for 'personal cloud storage' and 'syncs files across devices'—features unique to OneDrive for Business.
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
✓
OneDrive for Business
OneDrive for Business provides personal cloud storage that syncs files across devices via the OneDrive sync client and enables secure sharing with external partners through granular permission controls. This directly meets the requirement for individual file storage, cross-device synchronization, and external sharing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Exchange Online
Why it's wrong here
Exchange Online is a hosted messaging and calendaring service; its primary storage is mailbox folders (Inbox, Sent Items, Calendar) and attachments are limited to email context. It does not offer a file system with synchronization to a local client or file-level sharing for personal documents. Therefore, while you can store files as attachments, it is not a personal cloud storage solution.
- ✓
OneDrive for Business
Why this is correct
OneDrive for Business provides each user with a dedicated personal library in the cloud, enabling file sync via the OneDrive client, Files On-Demand to conserve local storage, and granular sharing with individuals or groups. It supports version history, co-authoring in Office apps, and integration with Teams and SharePoint. This matches the requirement for personal cloud storage.
- ✗
Microsoft Teams
Why it's wrong here
Teams provides file storage in each channel's Files tab, but that storage is actually a SharePoint document library shared by all channel members; it is designed for team collaboration, not private individual storage. Each user's personal files in Teams are accessed via the OneDrive tab, not stored directly in Teams itself. Thus, Teams is not the personal cloud service.
- ✗
SharePoint Online
Why it's wrong here
SharePoint Online is a platform for team sites, lists, and document libraries where permissions are administered by site owners and content is organized collaboratively. While OneDrive for Business is technically a SharePoint site (or a library on MySite), the product 'SharePoint Online' itself is not the per-user personal storage offering. Selecting SharePoint Online would address a team's shared document management, not an employee's personal cloud.
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Microsoft 365 SLAs and Service Guarantees
Key term
OneDrive for Business
OneDrive for Business is a cloud-based file storage and synchronization service from Microsoft, part of Microsoft 365, that lets users store, access, and share work files securely from anywhere.
Key term
Cloud storage
Cloud storage is a service that lets you save data on remote servers accessed over the internet instead of on your computer's hard drive.
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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.