CSA 5.0 and earlier
Change the host name by following the procedure documented at this link:
http://www.cisco.com/en/US/products/sw/cscowork/ps2330/products_configuration_example09186a0080472c19.shtml#csa-mc
CSA 5.1 and later
Changing the hostname is not supported on CSA 5.1 and later. The hostname must remain the same as when the CSA MC was installed. For more information, please see CSCsv9088.