Plum's Talent Rediscovery feature may only be available in a read-only state when Plum is integrated with your ATS/HCM. This means you can view a match ring that represents how great of a match applicants are for a particular job, but cannot move applicants within Plum. That move must be made in your ATS/HCM.
In some instances, we are currently investigating or developing the ability to allow this functionality to work in concert with your ATS/HCM system. There are other instances when an ATS/HCM vendor has not created the needed resources for us to make Talent Rediscovery work without compromising user experience to an unacceptable level. In these cases, further conversations with you and your ATS provider would be necessary.