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. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 organization has just purchased Microsoft 365 Business Standard licenses and has added the custom domain 'contoso.com' to the tenant. The administrator wants all new user email addresses to use '@contoso.com' instead of the default '@contoso.onmicrosoft.com'. How can this be achieved?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the default domain in the Microsoft 365 admin center to contoso.com
Setting the default domain to 'contoso.com' in the Microsoft 365 admin center ensures that all newly created users automatically receive an email address with the custom domain as their primary SMTP address. This is the standard method because the default domain setting controls the domain appended to new user accounts during creation, eliminating the need for manual changes.
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.
✓
Set the default domain in the Microsoft 365 admin center to contoso.com
Why this is correct
Correct. Changing the default domain ensures new users use @contoso.com automatically.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the primary SMTP address for each user manually after creation
Why it's wrong here
Incorrect. This is possible but not efficient or automatic; the default domain method is simpler.
✗
Remove the onmicrosoft.com domain from the tenant
Why it's wrong here
Incorrect. The initial onmicrosoft.com domain cannot be removed from the tenant.
✗
Edit the user creation PowerShell script to specify the domain
Why it's wrong here
Incorrect. While PowerShell can be used, it is not the standard configuration change; setting the default domain is preferred.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think they must manually update each user or use PowerShell because they overlook the simple default domain configuration in the admin center, which automatically applies to all new user creations.
Detailed technical explanation
How to think about this question
The default domain setting in the Microsoft 365 admin center modifies the 'domainName' attribute in Azure AD that is used during user provisioning. When a new user is created via the admin center or through automatic synchronization, the system reads this default domain to construct the UserPrincipalName (UPN) and primary SMTP address. This setting does not affect existing users, so if the domain was added after users were created, their primary addresses remain unchanged unless explicitly updated.
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: Set the default domain in the Microsoft 365 admin center to contoso.com — Setting the default domain to 'contoso.com' in the Microsoft 365 admin center ensures that all newly created users automatically receive an email address with the custom domain as their primary SMTP address. This is the standard method because the default domain setting controls the domain appended to new user accounts during creation, eliminating the need for manual changes.
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.
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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