Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A company has an Azure Storage account with infrastructure encryption enabled. They configure the storage account to use customer-managed keys (CMK) stored in Azure Key Vault for encryption at rest. Despite this configuration, newly uploaded blobs are still encrypted with Microsoft-managed keys. What is the most likely cause?
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
The storage account was created before infrastructure encryption was generally available
Infrastructure encryption is a feature that can be enabled at creation time, but it does not affect which key type (customer vs. Microsoft) is used for encryption.
B
Distractor review
The customer-managed key in Key Vault is disabled or expired
If the CMK is disabled or expired, attempts to write new blobs will fail; they will not silently fall back to Microsoft-managed keys.
C
Best answer
The storage account's encryption type is set to Microsoft-managed keys
The storage account must have its encryption type explicitly set to 'Customer-managed keys'. If it is set to 'Microsoft-managed keys', all blobs are encrypted with Microsoft-managed keys regardless of the key vault configuration.
D
Distractor review
The blob container has a policy that overrides the encryption setting
Blob containers do not have policies that can override the storage account's encryption type. Encryption is applied at the storage account level.
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 AZ-500 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: The storage account's encryption type is set to Microsoft-managed keys — When a storage account is configured to use customer-managed keys, the encryption type at the storage account level must be explicitly set to 'Customer-managed keys'. If it remains set to 'Microsoft-managed keys', even if infrastructure encryption is enabled, the storage account will use Microsoft-managed keys for all new data. The CMK configuration in the storage account blade includes a toggle to select the key type. If the key is disabled or expired, writes would fail, not fall back to Microsoft-managed keys. Container-level policies cannot override storage account encryption settings.
What should I do if I get this AZ-500 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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