- A
A service endpoint on the destination storage account subnet
Why wrong: A service endpoint only helps traffic from an Azure subnet and does not provide the trusted-service bypass described here.
- B
The Allow trusted Microsoft services to bypass this firewall setting
This setting is designed for supported Microsoft services that need to reach a storage account even when public network access is denied. It allows the service to deliver data without opening the firewall broadly and without requiring a private endpoint. Because the scenario explicitly says the destination is a trusted Microsoft service, this is the correct and minimal change.
- C
A shared access signature with read permission
Why wrong: A SAS controls authorization, not network reachability, so it cannot overcome the storage firewall restriction.
- D
A private DNS zone linked to the workspace virtual network
Why wrong: DNS changes matter for private endpoints, but the scenario explicitly says a private endpoint cannot be created.
Trusted Microsoft Services Bypass — Allow Backup and Diagnostics
This AZ-104 practice question tests your understanding of implement and manage storage. 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.
Diagnostic settings on an Azure storage account must send logs to a destination storage account that has its firewall set to deny all public network access. The team cannot create a private endpoint, but the destination service is one of the Azure services that can bypass the firewall as a trusted Microsoft service. What should the administrator enable?
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
The Allow trusted Microsoft services to bypass this firewall setting
Option B is correct because the 'Allow trusted Microsoft services to bypass this firewall' setting enables specific Azure services, such as Azure Monitor or Azure Backup, to write diagnostic logs to a storage account even when the storage account's firewall blocks all public network access. This bypass is controlled at the Azure platform level and does not require a private endpoint or public IP, making it the only viable solution when the destination storage account denies all public traffic.
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.
- ✗
A service endpoint on the destination storage account subnet
Why it's wrong here
A service endpoint only helps traffic from an Azure subnet and does not provide the trusted-service bypass described here.
When this WOULD be correct
This option would be correct if the question asked: 'How to allow access to a storage account from a specific virtual network without using a private endpoint?' In that scenario, enabling a service endpoint on the source subnet and adding it to the storage account firewall rules would be the solution.
- ✓
The Allow trusted Microsoft services to bypass this firewall setting
Why this is correct
This setting is designed for supported Microsoft services that need to reach a storage account even when public network access is denied. It allows the service to deliver data without opening the firewall broadly and without requiring a private endpoint. Because the scenario explicitly says the destination is a trusted Microsoft service, this is the correct and minimal change.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A shared access signature with read permission
Why it's wrong here
A SAS controls authorization, not network reachability, so it cannot overcome the storage firewall restriction.
When this WOULD be correct
When the question asks for a method to grant time-limited, delegated access to a specific storage resource (e.g., blob, file share) without sharing the account key, and the destination does not require firewall bypass. For example: 'An application needs to read blobs from a storage account for 24 hours without using the account key.'
- ✗
A private DNS zone linked to the workspace virtual network
Why it's wrong here
DNS changes matter for private endpoints, but the scenario explicitly says a private endpoint cannot be created.
When this WOULD be correct
This option would be correct in a scenario where an Azure service (e.g., Azure SQL Database) is configured with a private endpoint, and you need to ensure that the service's private IP address resolves correctly within a virtual network. The administrator would create a private DNS zone linked to the virtual network to enable custom DNS resolution for the private endpoint.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓The Allow trusted Microsoft services to bypass this firewall settingCorrect answer▾
Why this is correct
This setting is designed for supported Microsoft services that need to reach a storage account even when public network access is denied. It allows the service to deliver data without opening the firewall broadly and without requiring a private endpoint. Because the scenario explicitly says the destination is a trusted Microsoft service, this is the correct and minimal change.
✗A service endpoint on the destination storage account subnetWrong answer — click to see why▾
Why this is wrong here
A service endpoint on the destination storage account subnet would allow access from a specific virtual network, but the question requires bypassing the firewall for a trusted Microsoft service, not for a VNet. The destination storage account's firewall is set to deny all public access, and the source is a diagnostic setting, not a VNet.
★ When this WOULD be the correct answer
This option would be correct if the question asked: 'How to allow access to a storage account from a specific virtual network without using a private endpoint?' In that scenario, enabling a service endpoint on the source subnet and adding it to the storage account firewall rules would be the solution.
Why candidates choose this
Candidates may confuse service endpoints with the trusted Microsoft services bypass, thinking both allow access from Azure services. However, service endpoints are for VNet traffic, not for Azure platform services like diagnostic logs.
✗A shared access signature with read permissionWrong answer — click to see why▾
Why this is wrong here
A shared access signature (SAS) provides delegated access to a specific resource, but it does not bypass the storage account firewall. The firewall blocks all traffic unless explicitly allowed, and a SAS token does not override that restriction.
★ When this WOULD be the correct answer
When the question asks for a method to grant time-limited, delegated access to a specific storage resource (e.g., blob, file share) without sharing the account key, and the destination does not require firewall bypass. For example: 'An application needs to read blobs from a storage account for 24 hours without using the account key.'
Why candidates choose this
Candidates may confuse SAS with a mechanism to bypass firewalls because SAS tokens are often used to grant external access, but they do not affect network-level firewall rules.
✗A private DNS zone linked to the workspace virtual networkWrong answer — click to see why▾
Why this is wrong here
A private DNS zone linked to the workspace virtual network is used for custom domain name resolution within a virtual network, not for bypassing firewall rules on a storage account. The question requires enabling trusted Microsoft services to bypass the firewall, not DNS configuration.
★ When this WOULD be the correct answer
This option would be correct in a scenario where an Azure service (e.g., Azure SQL Database) is configured with a private endpoint, and you need to ensure that the service's private IP address resolves correctly within a virtual network. The administrator would create a private DNS zone linked to the virtual network to enable custom DNS resolution for the private endpoint.
Why candidates choose this
Candidates may confuse private DNS zones with private endpoints or think that DNS configuration is needed to allow access through a firewall, not realizing that the trusted Microsoft services bypass setting is the direct solution.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse service endpoints (Option A) with the trusted Microsoft services bypass, mistakenly thinking a service endpoint on the source subnet can grant access, when in fact the bypass is a distinct firewall exception that does not require any virtual network integration.
Trap categories for this question
Scenario analysis trap
DNS changes matter for private endpoints, but the scenario explicitly says a private endpoint cannot be created.
Detailed technical explanation
How to think about this question
Under the hood, the 'Allow trusted Microsoft services' setting relies on Azure's internal service tags and platform-level authentication; when a trusted service (e.g., Azure Monitor) writes to the storage account, Azure verifies the service's identity via its managed identity or resource ID, bypassing the IP-based firewall rules. A subtle behavior is that this setting does not apply to all Azure services—only those explicitly listed as trusted, such as Azure Backup, Azure Site Recovery, and Azure Monitor—and it requires the storage account's resource to be in the same Azure tenant. In a real-world scenario, if you need to send diagnostic logs to a storage account in a different region or subscription, you must ensure the destination storage account's firewall is configured with this setting enabled, as private endpoints are not an option.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Implement and Manage Storage — This question tests Implement and Manage Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Allow trusted Microsoft services to bypass this firewall setting — Option B is correct because the 'Allow trusted Microsoft services to bypass this firewall' setting enables specific Azure services, such as Azure Monitor or Azure Backup, to write diagnostic logs to a storage account even when the storage account's firewall blocks all public network access. This bypass is controlled at the Azure platform level and does not require a private endpoint or public IP, making it the only viable solution when the destination storage account denies all public traffic.
What should I do if I get this AZ-104 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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on AZ-104
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A backup job from an Azure service must write to a storage account that has the network firewall set to deny all public traffic. The team does not want to create a private endpoint for this workload. What should the administrator enable?
medium- ✓ A.Allow trusted Microsoft services to access the storage account
- B.Add the backup server's public IP address to the storage firewall
- C.Create a service endpoint on the subnet that hosts the backup job
- D.Disable the storage account firewall temporarily during each backup window
Why A: Option A is correct because Azure Storage firewalls include a special exception for 'Allow trusted Microsoft services to access this storage account'. When enabled, this exception permits Azure platform services—such as Azure Backup—to bypass the public network deny rule and write to the storage account without requiring a private endpoint. This works because the backup service runs on Microsoft-owned infrastructure that is authenticated and authorized at the control plane level, not via a public IP.
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Last reviewed: Jun 11, 2026
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