The bulkissuance utility sends a KEYGEN or a CRMF enrollment request to the bulk issuance interface of a CA to create certificates automatically. The bulkissuance utility does not generate the certificate request itself. It submits the content in the input file to the CA server's bulk issuance interface.

The bulk issuance interface is part of the agent interface of the CA. If the request is submitted through the agent interface, the request is processed, and the certificate is created immediately.