HI! Since I'm not able to import the CA cert ;-) but played with my client cert enrollment I have a certificate under "Your Certificates" with an unknown issuer. Now I tried to export this certificate to a PKCS#12 file which failed with "unknown error". This might happen because a PKCS#12 file contains usually also the CA cert chain. But IMHO PKCS#12 export used for backup should not never fail! Ciao, Michael.
