MS-102 Deploy and manage a Microsoft 365 tenant Practice Question
Your company recently merged with another company that uses Microsoft 365. Both tenants have the same primary domain, contoso.com. You need to merge the two tenants into a single tenant while preserving user email addresses. What should you do?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Remove the domain from the source tenant and add it to the target tenant, then migrate users.
To merge two Microsoft 365 tenants with the same domain, you must remove the domain from the source tenant, add it to the target tenant, and then migrate users' data. This preserves user email addresses because the domain is added to the target tenant before migration. Option B is the correct approach.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use cross-tenant collaboration settings to share the domain.
Why it's wrong here
Incorrect. Cross-tenant collaboration settings allow sharing resources but do not enable domain consolidation.
- ✓
Remove the domain from the source tenant and add it to the target tenant, then migrate users.
Why this is correct
Correct. Removing the domain from the source tenant and adding it to the target tenant, followed by user migration, merges the tenants while preserving email addresses.
- ✗
Configure a domain sharing agreement between both tenants.
Why it's wrong here
Incorrect. There is no domain sharing agreement feature in Microsoft 365 for merging tenants.
- ✗
Set up a federation trust between the two tenants.
Why it's wrong here
Incorrect. A federation trust between tenants does not consolidate domains or merge the tenants.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This MS-102 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MS-102 exam.