- A
Upgrade each user to Microsoft 365 Business Premium
Why wrong: Business Premium includes Plan 1 of Defender for Office 365, not Plan 2, so this would not meet the requirement for Plan 2.
- B
Purchase the Microsoft 365 Defender for Office 365 Plan 2 add-on
This add-on can be purchased per user for existing Business Standard subscribers to gain advanced threat protection features.
- C
Purchase Microsoft 365 E3 licenses
Why wrong: E3 is a different license family that includes some security features, but it's more expensive and not necessary if they only need the add-on.
- D
Install the Microsoft Defender for Endpoint standalone subscription
Why wrong: Defender for Endpoint protects endpoints, not email security, so it does not address the requirement for Office 365 threat protection.
MS-900 Describe Microsoft 365 pricing and support Practice Question
This MS-900 practice question tests your understanding of describe microsoft 365 pricing 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.
A company with 200 users has Microsoft 365 Business Standard licenses. They need to add Microsoft 365 Defender for Office 365 (Plan 2) for increased protection against advanced threats. What should they purchase?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Purchase the Microsoft 365 Defender for Office 365 Plan 2 add-on
Microsoft 365 Business Standard licenses include basic email security but lack advanced threat protection features like automated investigation, threat hunting, and simulation training. Purchasing the Microsoft 365 Defender for Office 365 Plan 2 add-on directly adds these capabilities to existing Business Standard users without requiring a license upgrade, making it the most cost-effective and targeted solution.
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.
- ✗
Upgrade each user to Microsoft 365 Business Premium
Why it's wrong here
Business Premium includes Plan 1 of Defender for Office 365, not Plan 2, so this would not meet the requirement for Plan 2.
- ✓
Purchase the Microsoft 365 Defender for Office 365 Plan 2 add-on
Why this is correct
This add-on can be purchased per user for existing Business Standard subscribers to gain advanced threat protection features.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Purchase Microsoft 365 E3 licenses
Why it's wrong here
E3 is a different license family that includes some security features, but it's more expensive and not necessary if they only need the add-on.
- ✗
Install the Microsoft Defender for Endpoint standalone subscription
Why it's wrong here
Defender for Endpoint protects endpoints, not email security, so it does not address the requirement for Office 365 threat protection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the licensing tiers and assume that upgrading to Business Premium is the only way to get advanced security, when in fact Microsoft offers targeted add-ons like Defender for Office 365 Plan 2 that can be layered onto existing Business Standard subscriptions without a full suite upgrade.
Detailed technical explanation
How to think about this question
Defender for Office 365 Plan 2 includes all Plan 1 features (Safe Links, Safe Attachments, anti-phishing) plus advanced capabilities like automated investigation and response (AIR), threat explorer, and attack simulation training. Under the hood, Plan 2 uses machine learning models and heuristics to analyze email headers, URLs, and attachment behaviors in real time, and it integrates with Microsoft 365 Defender portal for cross-domain threat correlation. In a real-world scenario, a user receiving a zero-day malware link would have it detonated in a sandbox, and if malicious, the system automatically triggers containment and remediation across all affected mailboxes.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this MS-900 question test?
Describe Microsoft 365 pricing and support — This question tests Describe Microsoft 365 pricing and support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Purchase the Microsoft 365 Defender for Office 365 Plan 2 add-on — Microsoft 365 Business Standard licenses include basic email security but lack advanced threat protection features like automated investigation, threat hunting, and simulation training. Purchasing the Microsoft 365 Defender for Office 365 Plan 2 add-on directly adds these capabilities to existing Business Standard users without requiring a license upgrade, making it the most cost-effective and targeted solution.
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
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Last reviewed: Jun 11, 2026
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.
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