The following guides have been used as a reference for clustering a certificate authority:
- https://social.technet.microsoft.com/wiki/contents/articles/15067.step-by-step-guide-clustering-an-existing-certification-authority.aspx
- https://social.technet.microsoft.com/wiki/contents/articles/9256.active-directory-certificate-services-ad-cs-clustering.aspx
They both indicate the use of a shared disk with a letter for storing the database and log. That disk is then added to the generic cluster role that is created for ADCS. Can a cluster shared volume be used instead?