This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 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?
Exchange Online
Why wrong: Exchange Online is for email.
OneDrive for Business
OneDrive for Business provides personal cloud storage with sync capabilities and external sharing.
Microsoft Teams
Why wrong: Microsoft Teams includes file storage but is primarily for collaboration.
SharePoint Online
Why wrong: SharePoint Online is for team sites, not personal storage.
Answer choices
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.
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.
Exchange Online
Why it's wrong here
Exchange Online is for email.
OneDrive for Business
Why this is correct
OneDrive for Business provides personal cloud storage with sync capabilities and external sharing.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Teams
Why it's wrong here
Microsoft Teams includes file storage but is primarily for collaboration.
SharePoint Online
Why it's wrong here
SharePoint Online is for team sites, not personal storage.
Common exam traps
The trap here is that candidates often 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.
Detailed technical explanation
OneDrive for Business uses the FSS (File Sync Service) to synchronize files via the Windows or macOS sync client, leveraging the Microsoft Graph API for real-time updates and conflict resolution. External sharing can be configured with specific link types (e.g., 'Anyone', 'People in your organization', 'Specific people') and expiration policies, all governed by SharePoint Online's sharing framework since OneDrive for Business is built on SharePoint Online infrastructure. A subtle behavior is that files shared externally via OneDrive appear in the recipient's own OneDrive if they have a Microsoft account, but they remain under the original tenant's retention policies.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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: 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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