This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO Microsoft 365 services can be used to provide secure remote access to on-premises applications without requiring a VPN?
Microsoft Entra Application Proxy
Provides secure remote access to on-premises web apps.
Microsoft Purview
Why wrong: Compliance, not remote access.
Microsoft Sentinel
Why wrong: SIEM, not remote access.
Microsoft Intune
Why wrong: Mobile device management, not remote access.
Microsoft Defender for Cloud Apps
Provides secure access to applications via Conditional Access.
Answer choices
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 provides secure remote access to on-premises web applications by publishing them through an external endpoint in Azure AD, without requiring a VPN. It works by establishing outbound connections from the on-premises Application Proxy connector to the Azure AD service, which then proxies user requests. This eliminates the need to open inbound firewall ports or maintain VPN infrastructure, making it ideal for remote access to legacy apps.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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
Provides secure remote access to on-premises web apps.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Purview
Why it's wrong here
Compliance, not remote access.
Microsoft Sentinel
Why it's wrong here
SIEM, not remote access.
Microsoft Intune
Why it's wrong here
Mobile device management, not remote access.
Microsoft Defender for Cloud Apps
Why this is correct
Provides secure access to applications via Conditional Access.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse Microsoft Intune (device management) or Microsoft Defender for Cloud Apps (CASB) with remote access solutions, but only Entra Application Proxy (and Defender for Cloud Apps as a reverse proxy for SaaS apps) directly provides VPN-less remote access to on-premises applications.
Detailed technical explanation
Entra Application Proxy uses a connector service installed on-premises that initiates outbound HTTPS (TCP/443) connections to the Azure AD service, which then handles user authentication via Azure AD Conditional Access and token-based authorization. The connector forwards traffic to the internal application without requiring inbound firewall rules, and it supports Kerberos constrained delegation for integrated Windows authentication. In a real-world scenario, an organization can publish a legacy SharePoint 2016 site without exposing it to the internet directly, leveraging pre-authentication and multi-factor authentication through Azure AD.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Entra Application Proxy — Microsoft Entra Application Proxy provides secure remote access to on-premises web applications by publishing them through an external endpoint in Azure AD, without requiring a VPN. It works by establishing outbound connections from the on-premises Application Proxy connector to the Azure AD service, which then proxies user requests. This eliminates the need to open inbound firewall ports or maintain VPN infrastructure, making it ideal for remote access to legacy apps.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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