MS-900 Describe Microsoft 365 apps and services Practice Question
This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. 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 Teams and wants to allow external partners to participate in shared channels without giving them full tenant access. Which identity solution 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
✓
Microsoft Entra External ID
Microsoft Entra External ID (formerly Azure AD External Identities) is the correct solution because it allows external partners to authenticate and access shared Teams channels without granting them full tenant access. Unlike guest access, which creates a B2B collaboration user object in the tenant, External ID enables cross-tenant access policies that limit partner identities to specific resources like shared channels, preserving tenant isolation.
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.
✗
Microsoft Teams guest access
Why it's wrong here
Guest access gives broader access than shared channels require.
✓
Microsoft Entra External ID
Why this is correct
External ID enables secure collaboration with external partners with controlled access.
Related concept
Read the scenario before looking for a memorised answer.
✗
Active Directory Federation Services
Why it's wrong here
AD FS is for on-premises identity federation, not for external partner access.
✗
Microsoft Entra ID B2C
Why it's wrong here
B2C is designed for customer-facing apps, not partner collaboration.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Teams guest access (which creates a guest user in the tenant) with the more restrictive B2B direct connect for shared channels, leading them to select guest access when the question explicitly requires 'without giving them full tenant access.'
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Entra External ID uses cross-tenant access settings to define inbound and outbound trust policies, enabling B2B direct connect for shared channels. This allows external partners to authenticate using their own identity provider (e.g., Azure AD, Google, or SAML/WS-Fed IdP) without provisioning a user object in your tenant, leveraging OAuth 2.0 and OpenID Connect for token exchange. In a real-world scenario, a partner organization can access a shared channel via Teams client using their own credentials, while your tenant enforces conditional access policies like MFA without exposing your entire directory.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Entra External ID — Microsoft Entra External ID (formerly Azure AD External Identities) is the correct solution because it allows external partners to authenticate and access shared Teams channels without granting them full tenant access. Unlike guest access, which creates a B2B collaboration user object in the tenant, External ID enables cross-tenant access policies that limit partner identities to specific resources like shared channels, preserving tenant isolation.
What should I do if I get this MS-900 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This MS-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MS-900 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.