We have a number of AWS instances which are cloned to bring up new servers and we ran into a problem with duplicate endpoint IDs in the MCS configuration. When the servers tried to register with Sophos Central they would receive a 401 error back. I've found how to set up the images for the servers to avoid this (KB article 133268) but I think it would be helpful to get an alert when an event like this or any other issue that prevents the server from registering. Obviously if some network issue prevents the server from connecting to the URL with with to register, there's now way Sophos Central can know and send an alert. But any other times where the client connects to Sophos Central and it fails should generate an alert.