You shouldn't have any issues since you are keeping the same server name (and FSC name?). However, changing the domain can give you trouble (service start/stop; volume file permissions; specified FQDN). The FSC services should be using a domain account since you are running distributed FMS with access spread across several servers in order to maintain permissions. If you have to change this account then you'll also want to redo the permissions on the directories/files to match. Search through preferences for the server name and change wherever applicable. Change the FMS Master for the new FSC server name if you declared it as FQDN. Delete the FSC cache before starting the service. That should do it.