MS-102 Deploy and manage a Microsoft 365 tenant Practice Question
An administrator has created a new user account in Microsoft Entra ID. To ensure the user has a mailbox in Exchange Online, what is the next step?
⚠ Common exam trap
A common mix-up: candidates think creating the user in Entra ID or configuring DNS automatically provisions a mailbox, but Microsoft 365 requires an explicit license assignment to enable the Exchange Online service plan for that user.
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
✓
Assign an Exchange Online license to the user
In Microsoft 365, a user must be assigned an Exchange Online license (part of an E3, E5, or standalone plan) before a mailbox is automatically provisioned in Exchange Online. Without a license, the user object exists in Entra ID but has no mailbox; the license assignment triggers the mailbox creation process within 24 hours.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Assign an Exchange Online license to the user
Why this is correct
In Microsoft Entra ID (Azure AD), a user object does not automatically have an Exchange Online mailbox until a license that contains the Exchange Online service plan (e.g., Microsoft 365 E3/E5, Exchange Online Plan 1/2) is assigned. Once assigned, the Exchange Online provisioning service creates the mailbox automatically, usually within minutes to a few hours, and the user can log in to Outlook or Outlook on the web. This is the only supported, self-service method for creating a mailbox for a standard user in a cloud-only environment.
- ✗
Create an Exchange mailbox manually
Why it's wrong here
In Exchange Online, you cannot manually create a mailbox for a cloud user using the Exchange admin center—the EAC's 'Create a mailbox' action only applies to shared, room, and equipment mailboxes, which are not associated with a user sign-in account. User mailboxes are derived from licensed user objects, so there is no separate 'create user mailbox' workflow. Attempting to create one manually would be both unsupported and redundant, because the licensing pipeline already manages the mailbox lifecycle.
- ✗
Run the Microsoft 365 Setup wizard
Why it's wrong here
The Microsoft 365 Setup wizard is a tenant-level onboarding tool that guides initial configuration, such as adding a custom domain, setting up user accounts, and selecting security defaults. It does not provision mailboxes for individual user objects; it runs once during tenant creation, and rerunning it won't create a mailbox for a specific new user. To get a mailbox, you must assign an Exchange Online license to that user.
- ✗
Configure DNS records for the domain
Why it's wrong here
DNS records such as MX, SPF, DKIM, and Autodiscover CNAMEs control how mail is routed to and from your Microsoft 365 tenant, but they do not trigger or influence the creation of a user's mailbox. Without a license, the new user has no mailbox, and adding these records will not change that—email for an unlicensed user would simply fail or bounce. DNS configuration is a post-provisioning step that matters only after mailboxes exist and the tenant needs to accept mail for its domains.
Go deeper
Related to this question
Learn chapter
Entra ID Protection and Risk Policies
Key term
Microsoft Entra ID
Microsoft Entra ID is a cloud-based identity and access management service that lets employees sign in and access resources both inside and outside of your organization.
Key term
Microsoft 365
Microsoft 365 is a subscription-based cloud service from Microsoft that combines productivity tools like Office apps with security, device management, and online storage.
About these practice questions
This MS-102 question is part of Courseiva's 712-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
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.