The answer is that the enterprise developer certificate is not trusted on the device. When an iOS line-of-business (LOB) app is signed with an enterprise certificate, the device must have that certificate manually trusted via Settings > General > VPN & Device Management; otherwise, iOS treats the app as untrusted and crashes it immediately on launch to prevent execution of unverified code. On the MD-102 exam, this scenario tests your understanding of iOS certificate trust chains and Intune deployment prerequisites, often appearing as a distractor where candidates mistakenly blame provisioning profiles or app configuration policies. A common trap is assuming the app will run because it installed successfully, but iOS blocks launch, not installation. Memory tip: think “install is not trust” — the app lands on the device, but iOS still needs a manual trust tap to let it run.
MD-102 Manage applications Practice Question
This MD-102 practice question tests your understanding of manage applications. 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.
You are deploying a line-of-business (LOB) app to iOS devices using Microsoft Intune. The app is signed with an enterprise certificate. Users report that the app installs but crashes immediately on launch. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The enterprise developer certificate is not trusted on the device.
If the app is not trusted (developer not manually trusted on device), iOS will block launch. Option A is incorrect because the app is signed with enterprise cert. Option C is irrelevant. Option D is possible but trust is more common first step.
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.
✗
The Intune company portal app is not installed.
Why it's wrong here
Company portal may be needed for installation but not launch crash.
✗
The app is not signed.
Why it's wrong here
The app is signed with an enterprise certificate.
✗
The app requires a VPN connection.
Why it's wrong here
VPN requirement would cause network error, not immediate crash.
✓
The enterprise developer certificate is not trusted on the device.
Why this is correct
iOS requires manual trust of enterprise cert before launching.
Clue confirmation
The clue words "most likely", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MD-102 question in full detail.
Identify which MD-102 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.
Manage applications — This question tests Manage applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The enterprise developer certificate is not trusted on the device. — If the app is not trusted (developer not manually trusted on device), iOS will block launch. Option A is incorrect because the app is signed with enterprise cert. Option C is irrelevant. Option D is possible but trust is more common first step.
What should I do if I get this MD-102 question wrong?
Identify which MD-102 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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely", "immediately / without restart". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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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. You are troubleshooting an Intune deployment of a line-of-business (LOB) app for iOS. The app fails to install on some devices with error '0x87D13B9F'. Which THREE actions should you take to diagnose the issue?
hard
A.Check the Intune Service Health dashboard for service incidents
✓ B.Check if the device is supervised and that the app requires supervised mode
C.Ensure that an app configuration policy is assigned to the device
✓ D.Verify that the app's provisioning profile has not expired
✓ E.Confirm that the device has sufficient storage space available
Why B: Options A, B, and E are correct. Verify the app is signed with a valid Apple Developer Enterprise certificate; expired certificates cause failures. Check that the device is not supervised if required; some LOB apps require supervised mode. Ensure the device has enough storage; error can be storage-related. Option C is wrong because Intune Service Health is not specific to app deployment. Option D is wrong because app configuration policies are optional.
Last reviewed: Jun 21, 2026
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This MD-102 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 MD-102 exam.
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