Techniques for determining target system connectivity between service domains are disclosed herein. For each of multiple service domains configured as a distributed management system, a discovery unit identifies subnets having at least one target system component within the service domain. The discovery unit determines from among the identified subnets, subnets that each extend between two or more of the service domains. For each of the subnets that extend between two or more of the service domains, the discovery unit detects target system network connections between two or more of the service domains. The discovery unit reports the detected target system network connections to one or more entities within the distributed management system.