Agents may show as inactive within the CA client but are started and running on the server(s).
Investigation of the AgentServiceProxy.nptlog file shows a connection error similar to the following:
"Connection attempt [nprepository4[default]/servername] failed. NetProLib: Protocol::CConection::InitiateAuthentication - Unable to authenticate to spn: nprepository4[default]/servername Msg:netprolib:sspi::clientcontext::Initialize - The target principle name is incorrect.. Connection: 014e29f0"
"System.ServiceModel.Security.SecurityNegotiationException: A call to SSPI failed, see inner exception. ---> System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. ---> System.ComponentModel.Win32Exception: The target principal name is incorrect"
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