A certification authority (CA) is needed to issue, validate, and manage certificates. The system will connect to all CAs ...

A certification authority (CA) is needed to issue, validate, and manage certificates.  The system will connect to all CAs in the following list to process certificate requests and to obtain information needed to manage these certificates.  Not all certificate templates are available from every CA. For diagnostic purposes, it may be helpful to identify all CAs in a forest.