- A
Microsoft Entra Application Proxy
Correct. Application Proxy provides secure remote access and SSO for on-premises web apps without needing a VPN.
- B
Microsoft Entra Connect
Why wrong: Entra Connect synchronizes on-premises Active Directory identities to Microsoft Entra ID, but does not enable remote access to applications.
- C
Microsoft Entra Domain Services
Why wrong: Domain Services provides managed domain services (e.g., domain join, group policy) for Azure VMs, not remote access to on-premises apps.
- D
Microsoft Entra ID P2 license
Why wrong: Entra ID P2 is a licensing plan that includes Identity Protection and Privileged Identity Management, but it is not a feature for remote app access.
Question 983 of 1,411
How to Publish On-Premises Apps with Application Proxy for Remote SSO Without VPN
This SC-900 practice question tests your understanding of describe the capabilities of microsoft entra. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 Microsoft Entra ID. The IT team wants to provide remote employees with secure, single sign-on (SSO) access to a critical on-premises web application that uses password-based authentication, without requiring a VPN connection. Which Microsoft Entra ID feature should they use?
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
✓
Microsoft Entra Application Proxy
Microsoft Entra Application Proxy enables secure remote access to on-premises web applications by publishing them through an external endpoint, without requiring a VPN. It supports password-based SSO by securely storing and replaying credentials to the legacy application, allowing users to authenticate once via Entra ID. This makes it the correct choice for providing SSO to a password-based on-premises app without a VPN.
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.
- ✓
Microsoft Entra Application Proxy
Why this is correct
Correct. Application Proxy provides secure remote access and SSO for on-premises web apps without needing a VPN.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Microsoft Entra Connect
Why it's wrong here
Entra Connect synchronizes on-premises Active Directory identities to Microsoft Entra ID, but does not enable remote access to applications.
When this WOULD be correct
A company wants to synchronize user accounts and passwords from an on-premises Active Directory to Microsoft Entra ID to enable cloud-based authentication and management. The question would ask: 'Which tool should they use to sync on-premises identities to the cloud?'
- ✗
Microsoft Entra Domain Services
Why it's wrong here
Domain Services provides managed domain services (e.g., domain join, group policy) for Azure VMs, not remote access to on-premises apps.
When this WOULD be correct
A company needs to lift-and-shift on-premises applications to Azure without re-architecting, and requires domain-joined VMs with managed domain services like Group Policy. Entra Domain Services would be correct for providing AD DS compatibility in Azure.
- ✗
Microsoft Entra ID P2 license
Why it's wrong here
Entra ID P2 is a licensing plan that includes Identity Protection and Privileged Identity Management, but it is not a feature for remote app access.
When this WOULD be correct
A question that asks which license is required to use Microsoft Entra ID Protection, Identity Governance (e.g., Privileged Identity Management), or Conditional Access policies with risk-based conditions. For example: 'Which license is needed to implement risk-based Conditional Access policies?'
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 SC-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Microsoft Entra Application ProxyCorrect answer▾
Why this is correct
Correct. Application Proxy provides secure remote access and SSO for on-premises web apps without needing a VPN.
✗Microsoft Entra ConnectWrong answer — click to see why▾
Why this is wrong here
Microsoft Entra Connect is used for synchronizing on-premises directories with Entra ID, not for proxying access to on-premises web applications. It does not provide SSO or eliminate the need for a VPN.
★ When this WOULD be the correct answer
A company wants to synchronize user accounts and passwords from an on-premises Active Directory to Microsoft Entra ID to enable cloud-based authentication and management. The question would ask: 'Which tool should they use to sync on-premises identities to the cloud?'
Why candidates choose this
Candidates may confuse Entra Connect with Application Proxy because both involve on-premises integration, and 'Connect' sounds like it provides connectivity for remote access.
✗Microsoft Entra Domain ServicesWrong answer — click to see why▾
Why this is wrong here
Microsoft Entra Domain Services provides managed domain services like domain join and LDAP, not secure remote access to on-premises web apps without VPN. The question requires a reverse proxy solution for password-based SSO, which is Application Proxy's role.
★ When this WOULD be the correct answer
A company needs to lift-and-shift on-premises applications to Azure without re-architecting, and requires domain-joined VMs with managed domain services like Group Policy. Entra Domain Services would be correct for providing AD DS compatibility in Azure.
Why candidates choose this
Candidates may confuse 'Domain Services' with providing access to on-premises resources, or think that domain services are needed for authentication to on-premises apps, not realizing Application Proxy handles this without domain join.
✗Microsoft Entra ID P2 licenseWrong answer — click to see why▾
Why this is wrong here
The question asks for a specific feature to provide SSO access to an on-premises web app without VPN. A Microsoft Entra ID P2 license is a licensing tier, not a feature; it does not directly enable SSO or remote access to on-premises apps.
★ When this WOULD be the correct answer
A question that asks which license is required to use Microsoft Entra ID Protection, Identity Governance (e.g., Privileged Identity Management), or Conditional Access policies with risk-based conditions. For example: 'Which license is needed to implement risk-based Conditional Access policies?'
Why candidates choose this
Candidates may think that a higher license tier (P2) is necessary for any advanced security feature, including Application Proxy, or they confuse licensing requirements with functional capabilities.
Analysis generated from the official SC-900blueprint 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 Microsoft Entra Connect (a sync tool) with Application Proxy, mistakenly thinking that syncing identities alone provides remote access and SSO to on-premises apps.
Detailed technical explanation
How to think about this question
Entra Application Proxy uses a connector agent installed on-premises that establishes outbound connections to the Entra ID cloud service, eliminating the need for inbound firewall ports. For password-based SSO, the proxy injects credentials into the application's login form using a browser extension or a dedicated credential store, which works with legacy apps that lack modern federation protocols like SAML or OIDC. This architecture ensures that remote users never directly connect to the internal network, maintaining security while enabling SSO.
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 SC-900 question test?
Describe the capabilities of Microsoft Entra — This question tests Describe the capabilities of Microsoft Entra — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Entra Application Proxy — Microsoft Entra Application Proxy enables secure remote access to on-premises web applications by publishing them through an external endpoint, without requiring a VPN. It supports password-based SSO by securely storing and replaying credentials to the legacy application, allowing users to authenticate once via Entra ID. This makes it the correct choice for providing SSO to a password-based on-premises app without a VPN.
What should I do if I get this SC-900 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
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