J.C. Hornbeck published an article from Lenny Wile on the Health of the Root Management Server is in a Grey “Not Monitored” State a couple of days ago. And you know what? I was facing the same issue after migrating my VM’s to Hyper-V yesterday.
But I also saw the next eventlogs:
Resetted the passwords for above users and restarted the Health Service.
And the RMS was Healthy again.
Ok not completely Healthy, but not grey anymore ;-)