The answer is to set the SharePoint Online external sharing setting to 'Only people in your organization'. This configuration is correct because it explicitly blocks all external access, ensuring that only users with a valid identity in your Microsoft Entra ID tenant can reach the site, regardless of how they were invited or authenticated. On the Microsoft 365 Administrator MS-102 exam, this question tests your understanding of SharePoint’s sharing hierarchy, where the tenant-level setting overrides any site-level permissions; a common trap is confusing this with site-level sharing policies or guest access controls, which still allow external users if enabled. To restrict SharePoint access to internal users only, remember that this setting is the most direct and effective control, as it prevents even invited guests from entering. A simple memory tip: think “tenant lock” — if you want no outsiders, set the tenant to “Only people in your organization” and you’re done.
MS-102 Deploy and manage a Microsoft 365 tenant Practice Question
This MS-102 practice question tests your understanding of deploy and manage a microsoft 365 tenant. 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.
You need to ensure that only users from your organization can access a SharePoint Online site. Which setting should you configure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the SharePoint Online external sharing setting to 'Only people in your organization'
Option A is correct because the SharePoint Online external sharing setting 'Only people in your organization' explicitly restricts all sharing and access to users who have a valid identity in your Microsoft Entra ID tenant. This setting prevents any external user (including guests) from accessing the site, regardless of how they were invited or authenticated. It is the most direct and effective control for limiting access to internal users only.
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.
✓
Set the SharePoint Online external sharing setting to 'Only people in your organization'
Why this is correct
This restricts access to internal users only.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a Conditional Access policy to block external users
Why it's wrong here
Conditional Access does not differentiate internal vs external at the site level.
✗
Configure the Microsoft Entra ID external collaboration settings
Why it's wrong here
These settings affect invitations but not existing site access.
✗
Modify the site permissions to remove external users
Why it's wrong here
This does not prevent future external access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse tenant-level external collaboration settings (Microsoft Entra ID) with site-level external sharing settings (SharePoint Online), assuming that blocking external users in Entra ID automatically restricts access to SharePoint sites, which is not the case because SharePoint has its own independent sharing controls.
Detailed technical explanation
How to think about this question
The SharePoint Online external sharing setting operates at the site collection level and is enforced by the SharePoint Online service itself, not by Microsoft Entra ID. When set to 'Only people in your organization', the site's access control list (ACL) will reject any user whose user principal name (UPN) does not belong to the tenant's verified domain. This setting also disables the ability to share links with anyone outside the organization, even if the user has edit permissions. In a real-world scenario, if a site is set to 'Only people in your organization', a guest user who was previously added via Microsoft Entra B2B collaboration will be denied access, even though they have a guest account in the tenant.
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.
TExam Day Tips
→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 MS-102 question in full detail.
Deploy and manage a Microsoft 365 tenant — This question tests Deploy and manage a Microsoft 365 tenant — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set the SharePoint Online external sharing setting to 'Only people in your organization' — Option A is correct because the SharePoint Online external sharing setting 'Only people in your organization' explicitly restricts all sharing and access to users who have a valid identity in your Microsoft Entra ID tenant. This setting prevents any external user (including guests) from accessing the site, regardless of how they were invited or authenticated. It is the most direct and effective control for limiting access to internal users only.
What should I do if I get this MS-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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