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. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 user reports that they cannot access their work email on their mobile device. The admin confirms the user has an Exchange Online license. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A Conditional Access policy requires app protection policies
Option D is correct because Conditional Access policies can require app protection policies (e.g., Intune MAM) to enforce data security on mobile devices. If the user's device does not have the required app protection policies applied, access to Exchange Online via mobile apps (including Outlook) will be blocked, even though the user has a valid Exchange Online license. This is a common scenario where licensing alone does not guarantee access when additional security controls are in place.
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.
✗
The user is using the Outlook mobile app
Why it's wrong here
Outlook mobile app is the recommended client.
✗
The user is trying to access Outlook on the web
Why it's wrong here
Outlook on the web works on mobile browsers.
✗
Exchange ActiveSync is disabled for the user
Why it's wrong here
Exchange ActiveSync is typically needed for mobile email.
✓
A Conditional Access policy requires app protection policies
Why this is correct
Conditional Access may block access if the device is not compliant.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a valid license (Exchange Online) guarantees access, but Microsoft 365 security features like Conditional Access can override licensing and block access based on policy requirements, especially on mobile devices.
Detailed technical explanation
How to think about this question
Conditional Access policies in Azure AD evaluate signals such as device compliance, location, and app protection status before granting access to Exchange Online. When an app protection policy is required, the user's mobile device must have the Intune Company Portal or the Outlook app with an app protection policy applied; otherwise, the authentication request is denied with a specific error message. In real-world scenarios, admins often combine Conditional Access with Intune MAM to enforce data loss prevention (DLP) without requiring full device enrollment (MDM).
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-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: A Conditional Access policy requires app protection policies — Option D is correct because Conditional Access policies can require app protection policies (e.g., Intune MAM) to enforce data security on mobile devices. If the user's device does not have the required app protection policies applied, access to Exchange Online via mobile apps (including Outlook) will be blocked, even though the user has a valid Exchange Online license. This is a common scenario where licensing alone does not guarantee access when additional security controls are in place.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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.