Recently I have created a community article regarding the SNI checks for each of the components in AppDynamics product - Controller, ES and EUM server. Please feel free to check it out, I have described exactly how SNI checks work, how to fix this issue permanently, and how to disable the SNI checks for each of the component of AppD: https://community.splunk.com/t5/AppDynamics-Knowledge-Base/AppDynamics-Platform-Best-Practices-and-Guidance-for-SNI-Checks/ta-p/753919  ... View more