MS-900 Practice Question: Describe security, compliance, privacy, and trust in Microsoft 365
This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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.
Contoso Pharmaceuticals uses Microsoft 365 E5 with Microsoft Purview. They have a requirement to automatically classify and protect documents containing research and development (R&D) data. The R&D data is stored in SharePoint Online and is defined by a custom sensitive info type that matches a specific pattern (e.g., 'R&D-XXXX-XXXX'). They want to apply a sensitivity label called 'Highly Confidential' to any document containing this pattern. The label should encrypt the document and restrict access to members of the R&D team only. Additionally, they want users to be prompted to apply the label when they create a new document in the R&D site. What should you configure?
Create a DLP policy that blocks sharing of documents containing the pattern.
Why wrong: DLP blocks sharing but does not apply labels or encryption.
B
Configure a default sensitivity label for the R&D SharePoint site.
Why wrong: Default label applies to all documents, not based on content.
C
Create an auto-labeling policy in Microsoft Purview that applies the 'Highly Confidential' label to documents containing the custom sensitive info type.
Auto-labeling can automatically apply the label with encryption and access control.
D
Train users to manually apply the 'Highly Confidential' label to R&D documents.
Why wrong: Manual labeling does not guarantee compliance and is not automatic.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an auto-labeling policy in Microsoft Purview that applies the 'Highly Confidential' label to documents containing the custom sensitive info type.
Option A is correct. Auto-labeling policies can automatically apply a sensitivity label based on sensitive info types. The label should be configured with encryption and access restrictions. Option B (manual labeling) does not meet the automatic requirement. Option C (DLP policy) can detect but not apply labels automatically. Option D (default label) only applies a default label, not based on content.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Create a DLP policy that blocks sharing of documents containing the pattern.
Why it's wrong here
DLP blocks sharing but does not apply labels or encryption.
✗
Configure a default sensitivity label for the R&D SharePoint site.
Why it's wrong here
Default label applies to all documents, not based on content.
✓
Create an auto-labeling policy in Microsoft Purview that applies the 'Highly Confidential' label to documents containing the custom sensitive info type.
Why this is correct
Auto-labeling can automatically apply the label with encryption and access control.
Related concept
Static NAT maps one inside address to one outside address.
✗
Train users to manually apply the 'Highly Confidential' label to R&D documents.
Why it's wrong here
Manual labeling does not guarantee compliance and is not automatic.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MS-900 NAT questions on configuration and troubleshooting.
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create an auto-labeling policy in Microsoft Purview that applies the 'Highly Confidential' label to documents containing the custom sensitive info type. — Option A is correct. Auto-labeling policies can automatically apply a sensitivity label based on sensitive info types. The label should be configured with encryption and access restrictions. Option B (manual labeling) does not meet the automatic requirement. Option C (DLP policy) can detect but not apply labels automatically. Option D (default label) only applies a default label, not based on content.
What should I do if I get this MS-900 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MS-900 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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