Which cmdlet should you use?

Your network contains one Active Directory domain named contoso.com. The domain contains 10 domain
controllers and a read-only domain controller (RODC) named RODC01.
You need to ensure that when administrators create users in contoso.com, the default user principal name
(UPN) suffix is litwareinc.com.
Which cmdlet should you use?

A.
the ntdsutil command

B.
the Set-ADDomain Windows PowerShell cmdlet

C.
the Install-ADDSDomain Windows PowerShell cmdlet

D.
the dsadd command

E.
the dsamain command

F.
the dsmgmt command

G.
the net user command

H.
the Set-ADForest Windows PowerShell cmdlet

Explanation:
The followingexample demonstrates how to create a new UPN suffix for the users in the Fabrikam.com forest:
Set-ADForest -UPNSuffixes @{Add=”headquarters.fabrikam.com”}