- A
Use Azure Active Directory B2C with custom policies to translate the authentication protocol.
Why wrong: Azure AD B2C is for customer identity and access management, not for enterprise legacy apps.
- B
Deploy Azure Active Directory Domain Services and domain-join the application servers.
Why wrong: Azure AD DS provides domain services but does not integrate proprietary protocols with Microsoft Entra ID.
- C
Configure Microsoft Entra ID Application Proxy to provide secure remote access and pass through authentication.
Application Proxy supports pass-through authentication for legacy protocols.
- D
Implement Azure Active Directory Connect with pass-through authentication.
Why wrong: Azure AD Connect syncs identities and enables pass-through auth for on-premises apps that support modern protocols.
Quick Answer
The answer is to configure Microsoft Entra ID Application Proxy to provide secure remote access and pass through authentication. This solution is correct because Application Proxy acts as a reverse proxy that can forward authentication requests unchanged to the legacy on-premises application, allowing proprietary authentication protocols to continue working without any code modification. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your understanding of identity integration patterns for legacy app authentication with Microsoft Entra ID when no code change is possible—a common trap is confusing this with Azure AD Domain Services, which only supports Kerberos or NTLM, or Azure AD Connect, which only syncs identities without handling protocol translation. The key distinction is that Application Proxy enables passthrough authentication for unsupported protocols, while other services require protocol compatibility. Memory tip: think “Proxy Passes Through” to remember that Application Proxy simply passes authentication through to the legacy app without translation.
AZ-305 Design infrastructure solutions Practice Question
This AZ-305 practice question tests your understanding of design infrastructure solutions. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Your organization is migrating a legacy on-premises application to Azure. The application uses a proprietary authentication protocol that is not supported by Microsoft Entra ID. You need to integrate the application with Microsoft Entra ID without modifying the application code. What should you do?
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
Configure Microsoft Entra ID Application Proxy to provide secure remote access and pass through authentication.
Option A is correct because Microsoft Entra ID Application Proxy can be configured to pass authentication to the on-premises application, allowing legacy protocols. Option B (Azure AD Domain Services) is for Kerberos/NTLM. Option C (Azure AD B2C) is for customer-facing apps. Option D (Azure AD Connect) syncs identities but doesn't help with protocol translation.
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.
- ✗
Use Azure Active Directory B2C with custom policies to translate the authentication protocol.
Why it's wrong here
Azure AD B2C is for customer identity and access management, not for enterprise legacy apps.
- ✗
Deploy Azure Active Directory Domain Services and domain-join the application servers.
Why it's wrong here
Azure AD DS provides domain services but does not integrate proprietary protocols with Microsoft Entra ID.
- ✓
Configure Microsoft Entra ID Application Proxy to provide secure remote access and pass through authentication.
Why this is correct
Application Proxy supports pass-through authentication for legacy protocols.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Implement Azure Active Directory Connect with pass-through authentication.
Why it's wrong here
Azure AD Connect syncs identities and enables pass-through auth for on-premises apps that support modern protocols.
Common exam traps
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.
Detailed technical explanation
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.
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
Got this wrong? Here's your next step.
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
- →
Design infrastructure solutions — study guide chapter
Learn the concepts, then practise the questions
- →
Design infrastructure solutions practice questions
Targeted practice on this topic area only
- →
All AZ-305 questions
999 questions across all exam domains
- →
Microsoft Azure Solutions Architect Expert AZ-305 study guide
Full concept coverage aligned to exam objectives
- →
AZ-305 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related AZ-305 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Design identity, governance, and monitoring solutions practice questions
Practise AZ-305 questions linked to Design identity, governance, and monitoring solutions.
Design data storage solutions practice questions
Practise AZ-305 questions linked to Design data storage solutions.
Design business continuity solutions practice questions
Practise AZ-305 questions linked to Design business continuity solutions.
Design infrastructure solutions practice questions
Practise AZ-305 questions linked to Design infrastructure solutions.
SAA-C03 VPC practice questions
Practise AZ-305 questions linked to SAA-C03 VPC.
SAA-C03 S3 lifecycle policy questions
Practise AZ-305 questions linked to SAA-C03 S3 lifecycle policy questions.
SAA-C03 RDS Multi-AZ questions
Practise AZ-305 questions linked to SAA-C03 RDS Multi-AZ questions.
SAA-C03 IAM policy practice questions
Practise AZ-305 questions linked to SAA-C03 IAM policy.
SAA-C03 Route 53 failover questions
Practise AZ-305 questions linked to SAA-C03 Route 53 failover questions.
SAA-C03 CloudFront practice questions
Practise AZ-305 questions linked to SAA-C03 CloudFront.
SAA-C03 NAT gateway questions
Practise AZ-305 questions linked to SAA-C03 NAT gateway questions.
SAA-C03 VPC endpoint questions
Practise AZ-305 questions linked to SAA-C03 VPC endpoint questions.
Practice this exam
Start a free AZ-305 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this AZ-305 question test?
Design infrastructure solutions — This question tests Design infrastructure solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure Microsoft Entra ID Application Proxy to provide secure remote access and pass through authentication. — Option A is correct because Microsoft Entra ID Application Proxy can be configured to pass authentication to the on-premises application, allowing legacy protocols. Option B (Azure AD Domain Services) is for Kerberos/NTLM. Option C (Azure AD B2C) is for customer-facing apps. Option D (Azure AD Connect) syncs identities but doesn't help with protocol translation.
What should I do if I get this AZ-305 question wrong?
Identify which AZ-305 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
Last reviewed: Jun 20, 2026
This AZ-305 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-305 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.