FrontendTransport health set unhealthy (OnPremisesSmtpClientSubmissionMonitor) - The client submission probe failed 3 times over 15 minutes.
Seems like these alerts have started comming for some of the servers, where mailbox and CAS role is installed together. when i cehcked the queue, all seems to be fine. Performed the below mentioned steps, but the issue didn't fixed:
1. invoke-monitoringprobe" command doesn't work.
2. Have restarted "health manager service" didn't work.
Still the alert value is in uhealthy state, have anyone come across the same issue, if so, can you share what are the steps that we have take?
Your answers are much appreciated!