I have Windows Server 2008 I work by command "wbadmin" to backup & restore without any problem So here it does not have anything problem. The question is: That after get a new backup I create Child Domain and for some reason I restored the backup. Is there a way to restore and maintain the Child Domain Or should I build it one of the first new??
Not sure, but I think recreating the child domain really is the best thing to do. You'll have to demote a child domain's DC before you can promote it and then set it up for the new child domain.