MS-102 · Question #18
Your network contains an Active Directory forest named contoso.local. You purchase a Microsoft 365 subscription. You plan to move to Microsoft 365 and to implement a hybrid deployment solution for…
The correct answer is D. Purchase a custom domain name. The on-premises Active Directory forest uses the non-routable suffix '.local' (contoso.local). Microsoft 365 and Azure AD require a publicly routable, internet-registered domain name for user UPNs and directory synchronization. Before implementing Azure AD Connect directory…
Question
Your network contains an Active Directory forest named contoso.local. You purchase a Microsoft 365 subscription. You plan to move to Microsoft 365 and to implement a hybrid deployment solution for the next 12 months. You need to prepare for the planned move to Microsoft 365. What is the best action to perform before you implement directory synchronization? More than one answer choice may achieve the goal. Select the BEST answer.
Options
- APurchase a third-party X.509 certificate.
- BCreate an external forest trust.
- CRename the Active Directory forest.
- DPurchase a custom domain name.
How the community answered
(35 responses)- A3% (1)
- B14% (5)
- C9% (3)
- D74% (26)
Explanation
The on-premises Active Directory forest uses the non-routable suffix '.local' (contoso.local). Microsoft 365 and Azure AD require a publicly routable, internet-registered domain name for user UPNs and directory synchronization. Before implementing Azure AD Connect directory synchronization, you must purchase a custom domain name (such as contoso.com), add it to Microsoft 365, and verify ownership via DNS. This allows you to assign users routable UPN suffixes and ensures a smooth hybrid deployment. Option A (third-party X.509 certificate) is needed for ADFS federation, which is not always required. Option B (external forest trust) is irrelevant here. Option C (renaming the forest) is technically possible but is a drastic, complex operation - purchasing a custom domain and adding an alternative UPN suffix is the simpler and best recommended approach.
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