With the following steps you can backup a CA.
- Export registry with the following line from command line:
reg export “HKLM\System\CurrentControlSet\Services\CertSvc\Configuration” c:\CaConfig\backup\configuration.reg /y
- Open AD CS mmc and make a backup pushing Backup CA, these are the steps:
When wizard appears push Next.
Select all check boxes and insert a specified path.
Insert a passphrase and push Next.
In the folder where you have saved the backup you will find the CA Certificate and the database files.