Backup Exec "Panther" will protect Windows 2000 and Windows 2003 servers. And the Continuous Protection Agents, Administration Console and core software may run on Windows 2000 and Windows 2003 servers. However, the Backup Destination must run under Windows Server 2003 or Storage Server 2003 operating systems in order to enable the snapshot capabilities. In most cases, the Continuous Protection Server is the Backup Destination. Thus, the Protection Server should operate under Windows Server 2003.