Microsoft 365 Administrator Expert MS-102 Practice Question
Your organization created its Microsoft 365 tenant as contoso.onmicrosoft.com several years ago. After a corporate re-branding, management requires that every new user you create automatically receives a user principal name (UPN) and primary SMTP address that ends with fabrikam.com. Existing addresses that end with contoso.com must continue to receive mail, and administrators should not have to change the domain suffix manually each time they provision a new account. What should you do in the Microsoft 365 admin center to meet the requirement?
Add fabrikam.com as a verified domain, complete DNS validation, and set it as the tenant's default domain.
Create a new Microsoft 365 tenant named fabrikam.onmicrosoft.com and migrate users and data from the existing tenant.
Rename the initial contoso.onmicrosoft.com domain to fabrikam.onmicrosoft.com so that new accounts inherit the new suffix automatically.
Delete the contoso.onmicrosoft.com domain, then add and verify fabrikam.com as the only remaining domain in the tenant.
The initial *.onmicrosoft.com domain assigned to a tenant cannot be renamed or deleted. Instead, you add the new vanity domain, complete DNS verification, and then make that domain the default. When a domain is set as the default, the Microsoft 365 admin center automatically assigns it to the UPN and primary SMTP address of every new user that is created, while existing proxy addresses on other verified domains continue to function for mail flow. Deleting the original domain, renaming the *.onmicrosoft.com domain, or creating a new tenant would either be impossible or require a full migration effort and therefore do not satisfy the stated constraints.
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Microsoft 365 Administrator Expert MS-102
Deploy and manage a Microsoft 365 tenant
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