The answer is a service principal authenticated with a certificate. This is the strongest non-human credential for an on-premises build server because certificate-based authentication uses asymmetric X.509 cryptography, where a private key stored securely on the server signs the authentication request, making it far more resistant to theft or replay than a client secret. In the AZ-104 exam, this scenario tests your understanding that managed identities are unavailable outside Azure, and that on-premises service principal certificate authentication is the practical, secure alternative when conditional access for device sign-in cannot be enforced. A common trap is choosing a client secret for simplicity, but secrets are static strings that can be leaked, whereas certificates require both the file and its private key password. Memory tip: think “cert for on-prem server” — certificates are the only non-human credential that combines cryptographic strength with offline storage, making them the default choice for build servers outside Azure.
AZ-104 Manage Azure Identities and Governance Practice Question
This AZ-104 practice question tests your understanding of manage azure identities and governance. 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 build server in an on-premises datacenter must deploy ARM templates to Azure. The automation must not use a human account password, and Microsoft Entra conditional access for device sign-in is not available because the server is outside Azure. The security team allows a non-human credential but wants the strongest practical option for this scenario. What should the administrator configure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A service principal authenticated with a certificate.
Option B is correct because a service principal authenticated with a certificate provides a non-human credential that does not require a human password and is the strongest practical option for an on-premises build server that cannot use managed identities (which are Azure-resource-scoped) or device-based conditional access. Certificate-based authentication for service principals uses asymmetric cryptography (X.509 certificates) with a private key stored securely on the build server, offering higher security than a client secret and meeting the requirement to avoid human account passwords.
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 system-assigned managed identity on the build server.
Why it's wrong here
Managed identities require an Azure resource, so they are not available for a server running on-premises.
✓
A service principal authenticated with a certificate.
Why this is correct
A certificate-based service principal is suitable for non-interactive automation outside Azure and avoids storing a user password.
Related concept
Read the scenario before looking for a memorised answer.
✗
A user-assigned managed identity shared with the build server.
Why it's wrong here
User-assigned managed identities still require an Azure resource to attach to and cannot be used directly on an on-premises server.
✗
A resource lock on the target resource group to permit template deployment.
Why it's wrong here
A lock does not authenticate the build server or grant it permission to deploy templates.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse managed identities (which are Azure-only) with service principals, assuming managed identities can be used for on-premises resources, but managed identities require an Azure resource context and cannot be assigned to non-Azure machines.
Detailed technical explanation
How to think about this question
A service principal authenticated with a certificate uses the OAuth 2.0 client credentials grant flow, where the build server presents the certificate (via its thumbprint or subject) to Azure AD to obtain an access token for the Microsoft Graph or Azure Resource Manager API. The certificate's private key should be stored in the Windows Certificate Store or a hardware security module (HSM) on the build server, and the certificate must be uploaded to the service principal in Azure AD; this setup avoids password exposure and supports automated rotation via certificate renewal. In practice, the administrator would use the `Connect-AzAccount -ServicePrincipal -CertificateThumbprint` PowerShell cmdlet or equivalent Azure CLI command with the `--certificate` parameter.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
Manage Azure Identities and Governance — This question tests Manage Azure Identities and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A service principal authenticated with a certificate. — Option B is correct because a service principal authenticated with a certificate provides a non-human credential that does not require a human password and is the strongest practical option for an on-premises build server that cannot use managed identities (which are Azure-resource-scoped) or device-based conditional access. Certificate-based authentication for service principals uses asymmetric cryptography (X.509 certificates) with a private key stored securely on the build server, offering higher security than a client secret and meeting the requirement to avoid human account passwords.
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.
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Question Discussion
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