EacBackEndLogonMonitor Unhealthy

Hi, After I rebooted my Exchange server i got this error

State          Name                       HealthSetName   AlertValue  ServerComponent
NotApplicable  EacBackEndLogonMonitor     ECP             Unhealthy   None

other servers looks fine.

i have 6 node exchange server 2016 cu 20 in DAG

what is EacBackEndLogonMonitor? And what is he responsible for?