What is the best action to perform before you implement directory synchronization?

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.
A . Purchase a third-party
B . 509 certificate.
C . Rename the Active Directory forest.
D . Purchase a custom domain name.
E . Create an external forest trust.

View Answer

Answer: C

Explanation:

The first thing you need to do before you implement directory synchronization is to purchase a custom domain name. This could be the domain name that you use in your on-premise Active Directory if it’s a routable domain name, for example, contoso.com.

If you use a non-routable domain name in your Active Directory, for example contoso.local, you’ll need to add the routable domain name as a UPN suffix in Active Directory.

Reference: https://docs.microsoft.com/en-us/office365/enterprise/set-up-directory-synchronization