The answer is SharePoint Online external sharing with authenticated external users. This is correct because it allows external partners to access a specific SharePoint site by leveraging Microsoft Entra ID B2B collaboration, which technically creates guest accounts in the directory but does not require manual guest account provisioning—the sharing invitation process handles authentication and access seamlessly. On the Microsoft Cybersecurity Architect exam, this question tests your ability to distinguish between external sharing options, with a common trap being the assumption that Entra ID B2B requires separate guest account management, when in fact SharePoint’s authenticated external sharing automates this. Avoid confusing this with Azure AD B2C, which is designed for customer-facing apps, or anonymous access, which lacks security for partners. Memory tip: think “SharePoint sharing with B2B under the hood” to remember that guest accounts are created automatically, not manually.
SC-100 Practice Question: Design security solutions for applications and data
This SC-100 practice question tests your understanding of design security solutions for applications and data. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your organization uses Microsoft Entra ID for identity and access management. You need to design a solution that allows external partners to access a specific SharePoint Online site without creating guest accounts. What should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
SharePoint Online external sharing with authenticated external users
Option B is correct because SharePoint Online external sharing can be configured to allow sharing with authenticated external users via Entra ID B2B collaboration, which creates guest accounts. Option A is wrong because Azure AD B2C is for customer-facing apps. Option C is wrong because Entra ID business-to-business (B2B) requires guest accounts. Option D is wrong because anonymous access is not secure for partners.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Anonymous sharing links
Why it's wrong here
Anonymous access is not secure for partner access.
✗
Microsoft Entra ID business-to-business (B2B) collaboration
Why it's wrong here
B2B collaboration creates guest accounts, which the scenario wants to avoid.
✓
SharePoint Online external sharing with authenticated external users
Why this is correct
External sharing can use Entra ID B2B to grant access via guest accounts.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Active Directory B2C (now part of Entra ID)
Why it's wrong here
B2C is for external customer identities, not for partners needing access to SharePoint.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Scenario analysis trap
B2B collaboration creates guest accounts, which the scenario wants to avoid.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-100 question in full detail.
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design security solutions for applications and data — This question tests Design security solutions for applications and data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: SharePoint Online external sharing with authenticated external users — Option B is correct because SharePoint Online external sharing can be configured to allow sharing with authenticated external users via Entra ID B2B collaboration, which creates guest accounts. Option A is wrong because Azure AD B2C is for customer-facing apps. Option C is wrong because Entra ID business-to-business (B2B) requires guest accounts. Option D is wrong because anonymous access is not secure for partners.
What should I do if I get this SC-100 question wrong?
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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