MS-900 Practice Question: Describe Microsoft 365 pricing, licensing, and support
This MS-900 practice question tests your understanding of describe microsoft 365 pricing, licensing, and support. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 has a mix of Microsoft 365 E3 and E5 licenses. You want to ensure that all users have the same security baseline. Which licensing strategy 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
✓
Assign Microsoft 365 E5 licenses to users requiring advanced security and keep E3 for others
Option A is correct because it aligns with a least-privilege security model: users who need advanced security features (e.g., Microsoft 365 E5's Microsoft Defender for Office 365, Microsoft Purview compliance, and advanced threat analytics) receive E5 licenses, while others retain E3. This ensures a consistent security baseline across the organization by applying the highest available security controls only where necessary, avoiding unnecessary cost and complexity.
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.
✓
Assign Microsoft 365 E5 licenses to users requiring advanced security and keep E3 for others
Why this is correct
This optimizes cost while meeting security requirements.
Related concept
Read the scenario before looking for a memorised answer.
✗
Upgrade all users to Microsoft 365 E5
Why it's wrong here
Upgrading all to E5 increases costs unnecessarily for users who don't need advanced security.
✗
Downgrade all users to Microsoft 365 E3
Why it's wrong here
Downgrading removes advanced security features from users who need them.
✗
Purchase a single E5 license and share it across all users
Why it's wrong here
Licenses cannot be shared; each user needs their own license.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume a uniform license tier (E5 for all) is the simplest way to achieve a consistent security baseline, overlooking the cost implications and the fact that E3 already provides a strong baseline—E5 adds advanced capabilities that should be targeted only where needed.
Detailed technical explanation
How to think about this question
Microsoft 365 E5 includes advanced security features such as Microsoft Defender for Office 365 Plan 2 (which provides automated investigation and response, threat hunting, and attack simulation training) and Microsoft Purview Compliance Manager (for regulatory compliance scoring). Under the hood, these features rely on tenant-level policies and per-user assignment; assigning E5 to only high-risk users ensures that security baselines (e.g., Data Loss Prevention policies, sensitivity labels) are enforced uniformly via Azure Active Directory conditional access and compliance policies, while E3 users still benefit from baseline protections like Exchange Online Protection and Microsoft Defender for Office 365 Plan 1.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 pricing, licensing, and support — This question tests Describe Microsoft 365 pricing, licensing, and support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Assign Microsoft 365 E5 licenses to users requiring advanced security and keep E3 for others — Option A is correct because it aligns with a least-privilege security model: users who need advanced security features (e.g., Microsoft 365 E5's Microsoft Defender for Office 365, Microsoft Purview compliance, and advanced threat analytics) receive E5 licenses, while others retain E3. This ensures a consistent security baseline across the organization by applying the highest available security controls only where necessary, avoiding unnecessary cost and complexity.
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.
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Question Discussion
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