ATP CLI command status_check always reports that the file telemetry server is not accessible.
The URL telemetry.symantec.com redirects HTTP requests that are not associated with file telemetry to the support landing page for ATP using a 300-series HTTP response. The ATP CLI command status_check fails to parse this reply as a valid response from the file telemetry server.
Symantec has address this issue in the ATPP 2.0.1 release. Before upgrading to ATPP 2.01 please backup you data first. The upgrade can only be obtain through the ATPP UI.
To use the tcp_check command to check connectivity to the file telemetry server
tcp_check telemetry.symantec.com 443
Connected to telemetry.symantec.com on port 443", then ATP can connect to the file telemetry server. No further action is necessary.