- A
Enable 'Allow trusted Microsoft services to bypass this firewall' in the Key Vault firewall settings
This setting allows trusted Azure services, including Azure SQL Database, to access the Key Vault even when the firewall is enabled, provided the SQL server has appropriate RBAC or access policy permissions.
- B
Configure a service endpoint for Microsoft.KeyVault on the SQL server's subnet
Why wrong: Service endpoints are for Azure services to access resources in a VNet, not for a service like SQL Database to access Key Vault. Also, SQL Database is not deployed in a VNet by default.
- C
Assign the SQL server's server identity the 'Contributor' role on the Key Vault
Why wrong: The SQL server needs the 'Key Vault Crypto Service Encryption User' role to use the key for TDE. Contributor does not grant key permissions. Also, without the firewall exception, access is blocked anyway.
- D
Create a private endpoint for the Key Vault in the SQL server's virtual network
Why wrong: A private endpoint would allow access from a specific VNet, but SQL Database is not deployed in a VNet by default; you would need to use Azure SQL Managed Instance or integrate with VNet. For a regular SQL Database, this is not straightforward and the trusted services exception is the standard solution.
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. 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 company uses Azure SQL Database with Transparent Data Encryption (TDE) and a customer-managed key (CMK) stored in Azure Key Vault. The Key Vault has a firewall that blocks all public access. The SQL server is a managed service that needs to access the key to perform TDE operations. The Key Vault is in the same Azure region as the SQL server. Which additional configuration is needed?
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
Enable 'Allow trusted Microsoft services to bypass this firewall' in the Key Vault firewall settings
When Azure Key Vault has a firewall that blocks all public access, Azure services like SQL Database that need to access the key for TDE operations must be explicitly allowed. Enabling 'Allow trusted Microsoft services to bypass this firewall' permits the SQL server's managed service identity to authenticate and retrieve the CMK from Key Vault, even when public network access is denied. This setting is required because the SQL server, as a platform-as-a-service (PaaS) resource, does not reside in a virtual network by default and cannot use a private endpoint or service endpoint without additional networking configuration.
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.
- ✓
Enable 'Allow trusted Microsoft services to bypass this firewall' in the Key Vault firewall settings
Why this is correct
This setting allows trusted Azure services, including Azure SQL Database, to access the Key Vault even when the firewall is enabled, provided the SQL server has appropriate RBAC or access policy permissions.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure a service endpoint for Microsoft.KeyVault on the SQL server's subnet
Why it's wrong here
Service endpoints are for Azure services to access resources in a VNet, not for a service like SQL Database to access Key Vault. Also, SQL Database is not deployed in a VNet by default.
- ✗
Assign the SQL server's server identity the 'Contributor' role on the Key Vault
Why it's wrong here
The SQL server needs the 'Key Vault Crypto Service Encryption User' role to use the key for TDE. Contributor does not grant key permissions. Also, without the firewall exception, access is blocked anyway.
- ✗
Create a private endpoint for the Key Vault in the SQL server's virtual network
Why it's wrong here
A private endpoint would allow access from a specific VNet, but SQL Database is not deployed in a VNet by default; you would need to use Azure SQL Managed Instance or integrate with VNet. For a regular SQL Database, this is not straightforward and the trusted services exception is the standard solution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a private endpoint or service endpoint is always required for secure access, but for PaaS services like Azure SQL Database that use managed identities, the 'Allow trusted Microsoft services' setting is the simplest and correct solution when the Key Vault firewall blocks public access.
Detailed technical explanation
How to think about this question
Under the hood, the 'Allow trusted Microsoft services' setting leverages Azure's internal service-to-service authentication, where the SQL server's managed identity (a service principal) is recognized as a trusted first-party service. This bypasses the Key Vault firewall by allowing traffic from Azure services that are authenticated and authorized via Azure AD, without requiring the request to originate from a specific VNet or public IP. In real-world scenarios, this setting is critical for scenarios like automated key rotation or disaster recovery, where the SQL server must access the key without manual network reconfiguration.
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.
What to study next
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FAQ
Questions learners often ask
What does this AZ-500 question test?
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable 'Allow trusted Microsoft services to bypass this firewall' in the Key Vault firewall settings — When Azure Key Vault has a firewall that blocks all public access, Azure services like SQL Database that need to access the key for TDE operations must be explicitly allowed. Enabling 'Allow trusted Microsoft services to bypass this firewall' permits the SQL server's managed service identity to authenticate and retrieve the CMK from Key Vault, even when public network access is denied. This setting is required because the SQL server, as a platform-as-a-service (PaaS) resource, does not reside in a virtual network by default and cannot use a private endpoint or service endpoint without additional networking configuration.
What should I do if I get this AZ-500 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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Last reviewed: Jun 11, 2026
This AZ-500 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 AZ-500 exam.
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