Submit Request to Symantec for Whitelisting Control Clients on Symantec Endpoint Network Threat Protection
Symantec constantly flags Control Clients as potentially unwanted because of the change in behavior when connecting to Control Cloud relay. Please contact Symantec to whitelist Control behavior when connecting to screenconnect.com.
More details can be found in ConnectWise Service Ticket #12456645
I've reported a false positive to Symantec.