Infront Active Directory MP - Compare Active Directory and Agents Installed
Infront.ActiveDirectory.CompareADAndAgents (Rule)
Compares the machine listing for the Active Directory Domain that Operations Manager is joined to and the SCOM agent listings, and raises an alert if there are systems found that do not have an agent installed. Note that the health state of the agent is not considered.
Knowledge Base article:
Summary
Performing a scan of Active Directory for servers that do not have SCOM agents installed
Infront Active Directory MP - Computers without Agents found in Active Directory
One or more computers have been found in the Active Directory domain SCOM is joined to that are not being monitored (either by a local agent installation or remotely monitored).