2.4 Assumptions and Preconditions
The Certificate Services protocols have the following assumptions, regardless of the mode:
The transport protocols, RPC, DCOM and SOAP, are available if the CA is to be accessed over a network.
The authentication protocols NTLM and SSL/TLS are available for authentication.
These additional assumptions apply when running in enterprise CA mode:
Active Directory is available for the storage and retrieval of certificate templates.
The Kerberos authentication protocol is available for the authentication and message security.