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 user needs to access their work files from a personal device without storing a copy locally. Which Microsoft 365 app should they use?
Microsoft Outlook
Why wrong: Outlook is for email.
OneDrive for Business
OneDrive for Business allows files on demand, streaming from the cloud.
Microsoft Teams
Why wrong: Teams can access files but often syncs locally.
Microsoft SharePoint
Why wrong: SharePoint requires browser or sync.
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 enables users to access work files from any device via the cloud, with the option to stream files on demand without downloading them locally. This is achieved through Files On-Demand, which uses placeholder files and syncs only metadata, ensuring no full copy is stored on the personal device unless explicitly made available offline.
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.
Microsoft Outlook
Why it's wrong here
Outlook is for email.
OneDrive for Business
Why this is correct
OneDrive for Business allows files on demand, streaming from the cloud.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Teams
Why it's wrong here
Teams can access files but often syncs locally.
Microsoft SharePoint
Why it's wrong here
SharePoint requires browser or sync.
Common exam traps
The trap here is that candidates may confuse SharePoint's web-based access with the ability to prevent local storage, overlooking that OneDrive for Business is the only option with a dedicated Files On-Demand feature that explicitly avoids storing a full copy locally on personal devices.
Detailed technical explanation
OneDrive for Business Files On-Demand relies on the Windows Cloud Files API and the sync engine to present placeholder files in File Explorer that contain only metadata (e.g., file name, size, thumbnail). When a user opens a file, only the necessary blocks are streamed from the cloud, and the file is not fully downloaded unless the user explicitly selects 'Always keep on this device'. This behavior is governed by the sync engine's use of the 'FILE_ATTRIBUTE_PINNED' and 'FILE_ATTRIBUTE_UNPINNED' attributes, and it respects the 'Available offline' and 'Free up space' context menu options.
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: OneDrive for Business — OneDrive for Business enables users to access work files from any device via the cloud, with the option to stream files on demand without downloading them locally. This is achieved through Files On-Demand, which uses placeholder files and syncs only metadata, ensuring no full copy is stored on the personal device unless explicitly made available offline.
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
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