Adding non english version of Symantec Endpoint Protection Manager (SEPM) as Endpoint Detection and Response (EDR) controller in ATP might fail with following error message: "SEPM returned a non-200 HTTP response"
Non english installations of SEPM might use a different SEP domain name than "Default". For example, in german version default domain is called "Standard". Please make sure to adjust the domain name in ATP EDR controller settings (Settings->Global->Endpoint Detection and Response) to resolve this issue.