The answer is that the devices are not in Supervised mode, as error 0x87D13B9F in Intune specifically flags a missing supervision state for iOS/iPadOS devices. This error occurs because Intune requires supervised mode to silently install ‘Required’ apps via MDM without user interaction; without it, the device rejects the managed app push, causing the deployment to fail. On the Microsoft 365 Endpoint Administrator MD-102 exam, this question tests your understanding of iOS enrollment restrictions and the distinction between supervised and unsupervised devices—a common trap is assuming any managed device can accept forced app installs. Remember that for iOS, ‘Required’ equals supervised; unsupervised devices can only prompt users to install from the Company Portal. A useful memory tip: think of supervision as the key that unlocks silent app deployment—no key, no silent install.
MD-102 Manage applications Practice Question
This MD-102 practice question tests your understanding of manage applications. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
An administrator deploys an iOS app as 'Required' to a group of devices using Intune. The app fails to install on some devices with error '0x87D13B9F'. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The devices are not supervised
Error 0x87D13B9F in Intune indicates that the device is not supervised. For iOS/iPadOS, Intune requires devices to be in Supervised mode to install 'Required' apps silently without user interaction. Without supervision, the device cannot accept managed app installations pushed by MDM, causing the deployment to fail.
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 devices have insufficient storage space
Why it's wrong here
Storage errors typically show a different code.
✗
The app is not compatible with the iOS version on those devices
Why it's wrong here
Compatibility issues would show a different error.
✗
The app is not signed with an Apple Enterprise Developer certificate
Why it's wrong here
Signing issues would show a different error.
✓
The devices are not supervised
Why this is correct
Required app deployment on iOS requires the device to be in supervised mode.
Clue confirmation
The clue word "most likely" 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
The trap here is that candidates often confuse generic installation failures (like storage or compatibility) with the specific supervised-mode requirement, because the error code is not immediately intuitive and many assume 'Required' apps can install on any device.
Trap categories for this question
Command / output trap
Storage errors typically show a different code.
Detailed technical explanation
How to think about this question
Supervised mode is enforced via Apple Device Enrollment Program (DEP) or Apple Configurator 2, and it grants MDM additional privileges such as silent app installation, removal of preinstalled apps, and network configuration lockdown. Intune's 'Required' assignment for iOS uses the MDM InstallApplication command, which only succeeds on supervised devices; on unsupervised devices, the command is rejected with error 0x87D13B9F. This behavior is defined in Apple's MDM protocol specification.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MD-102 question in full detail.
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 devices are not supervised — Error 0x87D13B9F in Intune indicates that the device is not supervised. For iOS/iPadOS, Intune requires devices to be in Supervised mode to install 'Required' apps silently without user interaction. Without supervision, the device cannot accept managed app installations pushed by MDM, causing the deployment to fail.
What should I do if I get this MD-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". 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.
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Question Discussion
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