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A compliance officer wants to ensure that all data in Microsoft 365 is encrypted using a key that the organization manages and stores in their own Azure Key Vault. Microsoft will not have access to the key. Which solution should they implement?

Question 1hardmultiple choice
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A compliance officer wants to ensure that all data in Microsoft 365 is encrypted using a key that the organization manages and stores in their own Azure Key Vault. Microsoft will not have access to the key. Which solution should they implement?

Full question →

Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Distractor review

Customer Lockbox

Customer Lockbox is a feature that gives customers explicit approval control over Microsoft support's access to their data, but it does not involve encryption keys.

B

Best answer

Double Key Encryption (DKE)

DKE enables customers to provide a second encryption key that Microsoft does not possess, ensuring that no one (including Microsoft) can access the protected data without both keys.

C

Distractor review

Information Rights Management (IRM)

IRM uses encryption and policies to restrict actions like copying or forwarding, but the keys are managed by Microsoft, not solely by the customer.

D

Distractor review

Microsoft Purview Data Lifecycle Management

Data Lifecycle Management focuses on retention and deletion of data, not on encryption key control.

Common exam trap

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.

Technical deep dive

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
  • Use explanations to understand the rule behind the answer.

TExam Day Tips

  • Underline the problem statement mentally.
  • 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.

Related practice questions

Related MS-900 practice-question pages

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More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

Question 1

During requirements gathering, an IT manager says the organization must let users provision resources from a portal without provider interaction. Cloud concept or benefit best matches this requirement?

Question 2

A compliance-aware administrator is selecting the right Microsoft 365 capability to use Microsoft 365 and another public cloud provider for different workloads. Cloud concept or benefit best matches this requirement?

Question 3

While preparing a Microsoft 365 adoption plan, a consultant is asked to manage leads, opportunities, customer accounts, and sales processes. Microsoft 365 app or service is the best fit?

Question 4

A project manager needs to create a detailed project schedule with a Gantt chart view, task dependencies, critical path analysis, and milestones. The schedule must be shared with team members who can update their tasks, and the manager wants to track progress against a baseline. Which Microsoft 365 app is specifically designed for this type of project management?

Question 5

A project manager wants to schedule a meeting with team members to discuss project progress. They need to find a time that works for everyone based on their calendars. Which Microsoft 365 app should they use?

Question 6

A project manager wants to create a visual dashboard that tracks project tasks, deadlines, and progress. The dashboard should pull data from a Microsoft List and update in real time. Which Microsoft 365 app is best suited for building this interactive dashboard?

FAQ

Questions learners often ask

What does this MS-900 question test?

Read the scenario before looking for a memorised answer.

What is the correct answer to this question?

The correct answer is: Double Key Encryption (DKE) — Double Key Encryption (DKE) is a Microsoft 365 feature that allows organizations to protect sensitive content with two keys: one held by Microsoft and one held by the organization (customer-managed). The customer stores their key in a location of their choice (e.g., Azure Key Vault), and Microsoft cannot decrypt the data without both keys, providing the required control. Customer Lockbox controls access by Microsoft support, not encryption. Information Rights Management (IRM) controls usage rights but does not use customer-held encryption keys. Data Lifecycle Management handles retention and deletion policies, not encryption.

What should I do if I get this MS-900 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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