Hello all, thank you for reply in advance 

we recently upgraded our ssl certificate to TLS supported version, ever since certificate changed in exchange server 2016 no we are reeving an error FAILURE :E-mail settings saved successfully. But error occurred while trying to check connection with mail server - Problem connecting to mailbox

I have tried the telnet to exchange server and followed couple of articles to get the cert to security folder in C:\ManageEngine\ServiceDesk\jre\lib\security

here is the cmd error