Your network contains an Active Directory forest named contoso.com.
The forest contains the domain controllers configured as shown in the following table.
You plan to deploy an Exchange Server 2013 organization to the forest
A company policy prevents administrators from logging on to DC2 to perform installations.
You need to prepare the Active Directory schema for the planned Exchange Server deployment.
You verify that your user account has all the required permissions to achieve the task. The solution
must minimize changes to the Active Directory infrastructure.
A.
Move the schema master role to DC1, and then run Exchange setup.
B.
Deploy a member server to contoso.com, and then move the server to the West site. Run
adprep.exe from the member server.
C.
Log on to DC3 and then run Exchange setup.
D.
Log on to any server in the West site, and then run Exchange setup.
The answer is C. There is no need to move the FSMO role.
https://technet.microsoft.com/en-us/library/bb125224(v=exchg.160).aspx#Step1
C:
“The computer where you’ll run the command to extend the schema needs to be in the same Active Directory domain and site as the schema master.”
A is correct.
The only way to extend schema is run setup.exe from AD, exchange setup does not provide ability to extend schema role.