Your Exchange organization contains recipients from the contoso.com and fabrikam.com domains.
All fabrikam.com users have a fabrikam.com e-mail address. All contoso.com users have a contoso.com address.
You need to configure the fabrikam.com user objects to have both contoso.com and fabrikam.com e-mail addresses.
What should you use?

A.
Active Directory Migration Tool version 3.0 to move users from the fabrikam.com domain to the contoso.com domain.

B.
Dsmod.exe to modify the mail attribute of each user in the fabrikam.com domain.

C.
Exchange System Manager to create a recipient policy.

D.
Ldifde.exe to modify the targetAddress attribute of each user in the fabrikam.com domain.