Since version 9.5 of the Message Gateway (SMG) appliance, you can restore a backup from another SMG with a different IP address and hostname. 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)