MS-102 Deploy and manage a Microsoft 365 tenant Practice Question
This MS-102 practice question tests your understanding of deploy and manage a microsoft 365 tenant. 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.
Your company is deploying Microsoft 365 for a new subsidiary with 500 users. You need to configure the initial tenant with a custom domain (contoso.com) and verify ownership. What is the first step you must perform?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a TXT record provided by Microsoft 365 to the contoso.com DNS zone.
To verify ownership of a custom domain in Microsoft 365, you must prove you control the domain's DNS zone. Microsoft provides a unique TXT record value that you add to the public DNS zone of contoso.com. Once the TXT record propagates, Microsoft queries it and confirms ownership, allowing you to proceed with domain configuration.
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.
✗
Delegate the contoso.com zone to Microsoft 365 DNS servers.
Why it's wrong here
Delegation is not required; verification only needs a DNS record.
✗
Create user accounts with the custom domain before verification.
Why it's wrong here
You cannot use an unverified domain for user accounts.
✓
Add a TXT record provided by Microsoft 365 to the contoso.com DNS zone.
Why this is correct
Verification requires adding a DNS record provided by the domain setup wizard.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set contoso.com as the default domain in the Microsoft 365 admin center.
Why it's wrong here
The domain must be verified before it can be set as default.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the order of operations, thinking they can set the domain as default or create users first, but Microsoft 365 strictly requires domain ownership verification before any domain-based configuration can proceed.
Detailed technical explanation
How to think about this question
The TXT record verification method uses a randomly generated string (e.g., MS=msXXXXXXXX) that Microsoft 365 provides. Microsoft's domain verification service performs a DNS TXT lookup against the domain's authoritative name servers; the record must be present and match exactly. This process is defined in RFC 1035 for DNS TXT records and is a standard domain control validation (DCV) method used across many cloud services.
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 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 MS-102 question in full detail.
Deploy and manage a Microsoft 365 tenant — This question tests Deploy and manage a Microsoft 365 tenant — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a TXT record provided by Microsoft 365 to the contoso.com DNS zone. — To verify ownership of a custom domain in Microsoft 365, you must prove you control the domain's DNS zone. Microsoft provides a unique TXT record value that you add to the public DNS zone of contoso.com. Once the TXT record propagates, Microsoft queries it and confirms ownership, allowing you to proceed with domain configuration.
What should I do if I get this MS-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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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