System Center Operations Manager (SCOM) is Microsoft's flagship on-premises monitoring platform. It uses management packs that encode vendor knowledge to monitor Windows servers, AD, Exchange, SQL Server, Hyper-V, and (via x-plat agents) Linux and Unix hosts.
For a CySA+ analyst SCOM is the canonical example of an operations monitoring tool that doubles as a security signal source — availability dips, service crashes, and policy violations all flow into its data warehouse and can be forwarded to a SIEM.