A.Create a reverse lookup zone in DNS for each new Domain.
B.Add a WINS lookup record to the DNS forward lookup zone.
C.Add a WINS reverse record to the DNS reverse lookup zone.
D.Enable Dynamic updates for DownLevel client computers on each DHCP server.
E.Install the Active Directory Client on All Computers in the Customer service department.

A.Use the ldifde command to migrate user settings.  
B.Use the User State Migration Tool (USMT) to Migrate user settings.  
C.Create trust relationships between the Chicago domain and the San Francisco domain. Use the Active Directory Migration Tool (ADMT) to migrate user settings.  
D.Create trust relationships between the forest root domain and the San Francisco domain. Use the Active Directory Migration Tool (ADMT) to migrate user settings.