Configure SharePoint External Sharing Policy to Allow Specific Domains with Invitation
This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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. A key principle to apply: external sharing policy. 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.
Exhibit
Refer to the exhibit.
```json
{
"displayName": "External Sharing Policy",
"sharingAllowedDomainList": ["fabrikam.com"],
"sharingBlockedDomainList": [],
"sharingCapability": "ExternalUserAndGuestSharing",
"requireExternalUserAcceptance": true
}
```
An administrator configures the SharePoint Online sharing policy as shown in the exhibit. What is the result of this configuration?
Exhibit
Refer to the exhibit.
```json
{
"displayName": "External Sharing Policy",
"sharingAllowedDomainList": ["fabrikam.com"],
"sharingBlockedDomainList": [],
"sharingCapability": "ExternalUserAndGuestSharing",
"requireExternalUserAcceptance": true
}
```
A
External users from any domain can access content without accepting an invitation.
Why wrong: The requireExternalUserAcceptance is true, so acceptance is required.
B
Only guests from any domain can access, but external users must be added manually.
Why wrong: The policy allows both external users and guests, and the allowed domain list restricts to fabrikam.com.
C
External users and guests from fabrikam.com can access content after accepting an invitation.
The policy allows external user and guest sharing, restricts to fabrikam.com, and requires acceptance.
D
External sharing is blocked for all domains except fabrikam.com.
Why wrong: The policy allows sharing with fabrikam.com, not blocks others.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
External users and guests from fabrikam.com can access content after accepting an invitation.
Option C is correct. The policy allows external users and guests from fabrikam.com to access content after they accept the sharing invitation. The allowed domain list permits fabrikam.com, and the requirement for invitation acceptance is implied by the non-'Anyone' sharing setting. Option A is wrong because external users must accept an invitation; they are not allowed to access content without accepting. Option B is wrong because external users and guests from fabrikam.com can access, but they must accept an invitation; they are not added manually in this context. Option D is wrong because external sharing is not blocked for all domains except fabrikam.com; rather, sharing is allowed only from fabrikam.com.
Key principle: External sharing policy
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
External users from any domain can access content without accepting an invitation.
Why it's wrong here
The requireExternalUserAcceptance is true, so acceptance is required.
✗
Only guests from any domain can access, but external users must be added manually.
Why it's wrong here
The policy allows both external users and guests, and the allowed domain list restricts to fabrikam.com.
✓
External users and guests from fabrikam.com can access content after accepting an invitation.
Why this is correct
The policy allows external user and guest sharing, restricts to fabrikam.com, and requires acceptance.
Related concept
External sharing policy
✗
External sharing is blocked for all domains except fabrikam.com.
Why it's wrong here
The policy allows sharing with fabrikam.com, not blocks others.
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.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
External sharing policy
Allowed domain list
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
External sharing policy
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-900 question in full detail.
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — External sharing policy.
What is the correct answer to this question?
The correct answer is: External users and guests from fabrikam.com can access content after accepting an invitation. — Option C is correct. The policy allows external users and guests from fabrikam.com to access content after they accept the sharing invitation. The allowed domain list permits fabrikam.com, and the requirement for invitation acceptance is implied by the non-'Anyone' sharing setting. Option A is wrong because external users must accept an invitation; they are not allowed to access content without accepting. Option B is wrong because external users and guests from fabrikam.com can access, but they must accept an invitation; they are not added manually in this context. Option D is wrong because external sharing is not blocked for all domains except fabrikam.com; rather, sharing is allowed only from fabrikam.com.
What should I do if I get this MS-900 question wrong?
Review external sharing policy, then practise related MS-900 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
External sharing policy
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