managed object
Computing term for an entity that is monitored and controlled by a management system, such as a network device or software component.
In SNMP, managed objects are defined in the MIB.
Please monitor the status of this managed object.
管理 is the general term for management or administration, while 管理対象 specifically refers to the thing being managed.
対象 means 'target' or 'object' in a broad sense; 管理対象 narrows it to a managed entity in a technical context.
Compound of 管理 (management) and 対象 (object/target). The exact historical derivation is uncertain, but the term is a straightforward technical compound.