MS-900 Describe Microsoft 365 apps and services Practice Question
This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
WideWorldImporters is a retail company with 500 employees. They use Microsoft 365 Business Premium. The company has a shared mailbox for customer inquiries that several employees monitor. Recently, they noticed that some emails from the shared mailbox are being deleted before being read. The IT admin investigates and finds that a PowerShell script runs daily to clean up the shared mailbox by deleting emails older than 30 days. However, some emails are being deleted before 30 days. The admin needs to ensure that no emails are deleted from the shared mailbox before they are read by at least one person. The admin also wants to retain all emails for a minimum of 30 days for compliance purposes, even if they are read. Additionally, the admin wants to prevent users from accidentally deleting emails from the shared mailbox. Which three configurations should the admin implement? (Choose three. Each correct answer is part of the solution.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Disable the PowerShell script that deletes emails older than 30 days.
Option A is correct because the PowerShell script is the root cause of premature deletions. Disabling it stops the automated cleanup that deletes emails before they are read, allowing the admin to implement controlled retention policies instead.
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.
✓
Disable the PowerShell script that deletes emails older than 30 days.
Why this is correct
The script is deleting emails prematurely; disabling it stops the issue.
Clue confirmation
The clue words "least", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
Place the shared mailbox on litigation hold for 30 days.
Why this is correct
Litigation hold retains all items, even if deleted, for the specified period.
Clue confirmation
The clue words "least", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable the shared mailbox for archiving to move old emails to archive.
Why it's wrong here
Archive moves but doesn't prevent deletion or ensure retention.
✓
Modify the shared mailbox permissions to remove 'Delete' access for users.
Why this is correct
Preventing deletion ensures emails are not accidentally removed.
Clue confirmation
The clue words "least", "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Apply a messaging records management (MRM) policy that deletes emails after 30 days.
Why it's wrong here
MRM policy would still delete based on age, not read status.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse archiving (Option C) with retention, not realizing that archiving does not prevent deletion or enforce a minimum retention period, and may incorrectly assume an MRM deletion policy (Option E) can be tuned to meet both the read-before-delete and 30-day retention requirements simultaneously.
Detailed technical explanation
How to think about this question
Litigation hold (Option B) places the entire mailbox on hold, preserving all content including deleted items until the hold is removed, which ensures no emails are purged before 30 days. Modifying permissions to remove 'Delete' access (Option D) prevents users from manually deleting emails, but does not stop automated scripts or policies; combined with disabling the script and litigation hold, it provides a layered defense against accidental or intentional deletion.
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 MS-900 question in full detail.
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Disable the PowerShell script that deletes emails older than 30 days. — Option A is correct because the PowerShell script is the root cause of premature deletions. Disabling it stops the automated cleanup that deletes emails before they are read, allowing the admin to implement controlled retention policies instead.
What should I do if I get this MS-900 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: "least", "minimum / minimize". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
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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