A backup taken from another SMG can be restored without changing the IP address and hostname of the new server. You need to know what what settings are preserved (not overwritten from the old settings) when restoring from a backup on another Symantec Messaging Gateway.
The following settings are left and not overwritten by the settings in the backup:
These flexible restore features enables easier appliance migration and disaster recovery.
(NOTE: License files are not saved in a backup. The Control Center must be licensed before you restore a backup, the license will not be overritten by the backup)
(NOTE: Message audit logs are not stored in a backup if the control center has the scanner components installed)