In the event of a crash of the Primary Server that holds the internal CA, you can restore the CA from backup:
At the command prompt of the ZENworks Server, enter the following zman command:
zman certificate-authority-import (certificate-authority-import/cai) (file path)
This command imports the key-pair credentials of the zone certificate authority from a file.
Enter the user name and password of the Management Zone administrator.
Enter the file encryption passphrase that you specified when you backed up the Certificate Authority file.