As configured in this case study, Profile management does not use the settings from NewDomain to initialize the cross-platform settings store. Only settings from OldDomain can be used to initialize the store. This is acceptable until NewDomain contains more than one type of profile (such as Windows 7 32-bit and Windows 7 64-bit). Alternatively, users from NewDomain may need to access resources in OldDomain. In these cases, you must enable the policy Source for creating cross-platform settings on further types of machine appropriately.
In this case study, separate domains are used to illustrate a number of points. Additionally, the cross-platform settings feature can manage the roaming of settings between two OUs, or even between machines of different types in a single OU. In this case, you might have to set the policy Source for creating cross-platform settings differently for the different machine types. This can be achieved in a number of ways: