MD-102 Manage applications Practice Question
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?
⚠ Common exam trap
Watch out — candidates often confuse 'signed' with 'trusted' — the app is signed, but iOS requires explicit trust of the enterprise certificate, which is a separate step often overlooked in MDM deployments.
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
✓
The enterprise developer certificate is not trusted on the device.
The most likely cause is that the enterprise developer certificate is not trusted on the device. iOS requires that enterprise-signed apps have their root certificate manually trusted via a profile (e.g., MDM or manual installation) before the app can run. Without this trust, iOS blocks the app from executing, causing an immediate crash on launch.
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.
Go deeper
Related to this question
Learn chapter
Introduction to Endpoint Management in Microsoft 365
Key term
Intune
Microsoft Intune is a cloud-based service that helps organizations manage their users' devices and applications, ensuring security and compliance without needing to own or control the physical hardware.
Key term
MDM
MDM stands for Mobile Device Management, a technology that allows IT administrators to securely manage, monitor, and enforce policies on mobile devices like smartphones and tablets from a central console.
About these practice questions
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Same concept, more angles
1 more way this is tested on MD-102
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: Error 0x87D13B9F in Intune for iOS LOB apps typically indicates a deployment restriction related to device supervision. If the app requires supervised mode (e.g., for managed app configuration or advanced MDM controls) and the target device is not supervised, Intune will fail to install the app with this error. Verifying supervision status is a primary diagnostic step.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.