To export a backup you'll need access to an FTP server.
- Logon to your vCNS either via https://IP or via vCenter/Solutions and Applications/vShield
- Settings & Reports on the Left of the screen, Configuration Tab, and then click Backups below the Updates tab
- Fill out IP, user, password, directory (must create a sub directory on FTP site or else it won't work), file prefix
- Click Save Settings button.
Now you can type the password again and click Backup button.
You can schedule backups as well, which is what we do. We had one die and it was a pain to cleanup our VCD DB and vApps that were using VSE's.
Eric