“Once Environment ActiveGate connects to Dynatrace Server, installation is complete. As soon as Environment ActiveGate connects to Dynatrace Server, OneAgent is informed and re-configured to send monitoring data through Environment ActiveGate. To check on the status of the installation, click the Show deployment statusbutton and select the Dynatrace ActiveGates tab.“
The only method is to check the agent logs or network connections (netstat / ss) to determine the actual connection. Normally as soon as ActiveGate is connected to the environment, a list of endpoint to connect to is updated and pushed to agents.
AFIK the best way is to check with ss (or netstat) the connected endpoints from the hosts itself.
From a Managed point of view, we had a few doubts if one of the Agents (in a far far away VLAN after a company Merge) connected to the EnvAG or to the ClusterAG... so we used ss to determine the actual connection...