Your network contains an Active Directory forest named fabrikam.com. The forest contains the following domains:

– Fabrikam.com

– Eu.fabrikam.com
– Na.fabrikam.com
– Eu.contoso.com
– Na.contoso.com

You need to configure the forest to ensure that the administrators of any of the domains can specify a user principal name (UPN) suffix of contoso.com when they create user accounts from Active Directory Users and Computers.

Which tool should you use?

A.
Active Directory Sites and Services

B.
Set-ADDomain

C.
Set-ADForest

D.
Active Directory Administrative Center

Explanation:
Creating a UPN Suffix for a Forest

This topic explains how to use the Active Directory module for Windows PowerShell to create a new user principal name (UPN) suffix for the users in a forest. Creating an additional UPN suffix helps simplify the names that are used to log on to another domain in the forest.

he following example demonstrates how to create a new UPN suffix for the users in the Fabrikam.com forest:

Set-ADForest -UPNSuffixes @{Add=”headquarters.fabrikam.com”}

http://technet.microsoft.com/en-us/library/dd391925%28v=ws.10%29.aspx