1. Open the Microsoft Management Console: Start > Programs > Windows NT 4.0 Option Pack > Microsoft Internet Information Server > Internet Service Manager.
  2. Right-click the Web site containing the certificate and select Properties.
  3. Click the Directory Security tab.
  4. In the Secure Communications section, click Edit.
  5. Click Key Manager.
  6. Select the key to export.
  7. On the menu bar, select Key > Export Key > Backup File.
  8. A message warns you about placing sensitive information in a file on your hard drive. Click OK.
  9. Specify the name of the file that will hold the exported key. Click Save.

We highly recommend backing up your SSL Certificate on a thumb drive or CD.