CAC is a special case of client certificate authentication, in which the client certificates are stored on PIN-protected smart cards. But from Go2Group's point of view, the client certificate on a CAC card is simply made available through the browser.
The method described below will allow the following Atlassian solutions to use client certificates for authentication without a password. However, the users (and their group membership and permissions) must already exist.
CAC for JIRA (ZIP file includes PDF documentation)
CAC for Bamboo (ZIP file includes PDF documentation)
CAC for Confluence (ZIP file includes PDF documentation)