You can configure a trusted connection of Kaspersky Sandbox to Kaspersky Endpoint Agent in the web interface of Kaspersky Sandbox that is not part of a cluster.
If you have already combined servers into a cluster, you must remove the server from the cluster then create a new cluster based on that server and add all servers intended for Kaspersky Sandbox to the new cluster.
If the servers you need are part of a different cluster, you must remove them from that cluster one by one and then add them to the new cluster.
Installing and configuring a trusted connection between Kaspersky Sandbox and Kaspersky Endpoint Agent involves: