On Windows Server systems where the certificate service role is installed, use the certification authority MMC snap-in to perform a backup of the Cert Svc site. This can be found under Administrative Tools.
In the MMC, right-click on the site name and choose View Tasks > Backup. Choose to backup all options and place the backup in a new directory under c:/windows/system32. The Unitrends backup will capture the certificate services backup information.
To restore certificate services data, restore the files captured by the Unitrends backup to their original location and use the certification authority MMC snap-in to perform a restore of the Cert Svc site.
From the same menu with which you backed up the certificate services information, choose All Tasks > Restore.