Problem
C:\Backup>Certutil -p “xxxxxxxxxx” -f -backup “c:\backup”
CertUtil: -backup command FAILED: 0x8009000b (-2146893813)
CertUtil: Key not valid for use in specified state.
Check:
Check the Certificate of your CA whether the Private Key can be exported by starting an export of the Certificate. If the option “Yes , export the private key” is greyed out , this is possibly the problem. The picture shows how it should be.
Solution
Reimport the certificate from Backup with the option to allow Private Key export
