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 sales team uses Microsoft Teams for collaboration. They need to securely share large files (up to 15 GB) with external partners without requiring the partners to sign in. Which Microsoft 365 service should they use?
OneDrive for Business
Correct. OneDrive can share large files with anyone via anonymous links.
Microsoft Lists
Why wrong: Incorrect. Lists is for tracking data, not sharing large files.
Microsoft Stream
Why wrong: Incorrect. Stream is for video content, not general file sharing.
SharePoint Online
Why wrong: Incorrect. SharePoint external sharing typically requires authentication.
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 allows users to share files with external partners via a secure link that does not require the partner to sign in, and supports file sizes up to 250 GB (including the 15 GB requirement). This meets the need for large file sharing without authentication, leveraging OneDrive's external sharing capabilities with anonymous guest links.
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.
OneDrive for Business
Why this is correct
Correct. OneDrive can share large files with anyone via anonymous links.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Lists
Why it's wrong here
Incorrect. Lists is for tracking data, not sharing large files.
Microsoft Stream
Why it's wrong here
Incorrect. Stream is for video content, not general file sharing.
SharePoint Online
Why it's wrong here
Incorrect. SharePoint external sharing typically requires authentication.
Common exam traps
The trap here is that candidates may choose SharePoint Online because it is a general-purpose collaboration platform, but they overlook the specific requirement of 'without requiring the partners to sign in,' which is more natively and commonly achieved via OneDrive for Business anonymous links, whereas SharePoint Online typically enforces authentication or a verification code by default.
Detailed technical explanation
OneDrive for Business uses anonymous guest links (also called 'Anyone' links) that generate a unique URL with an access token, allowing external users to download or view files without authentication. The maximum file size for upload to OneDrive is 250 GB, and sharing links can be set with expiration dates and password protection for added security. In contrast, SharePoint Online's anonymous sharing requires the 'Anyone' link type to be enabled at the tenant and site level, and it often defaults to authenticated sharing (e.g., 'Specific people' or 'People in your organization'), making OneDrive the simpler choice for ad-hoc large file sharing with external partners.
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.
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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 allows users to share files with external partners via a secure link that does not require the partner to sign in, and supports file sizes up to 250 GB (including the 15 GB requirement). This meets the need for large file sharing without authentication, leveraging OneDrive's external sharing capabilities with anonymous guest links.
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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