Your network contains an Active Directory domain named contoso.com. The domain contains two
domain controllers.
The domain controllers are configured as shown in the following table.

In the perimeter network, you install a new server named Server1 that runs Windows Server 2012
R2. Server1 is in a workgroup.
You need to perform an offline domain join of Server1 to the contoso.com domain.
What should you do first?

A.
Transfer the PDC emulator role to Dc1.

B.
Run the djoin.exe command.

C.
Run the dsadd.exe command.

D.
Transfer the infrastructure master role to DC1.

Explanation:
A)
Creates a new Active Directory computer.
B)
Use djoin for offline join in the perimeter network
C)
Adds specific types of objects to the directory.
D)
Add the local computer to a domain or workgroup.