I´ve here two Exchange 2016 servers behind two kemp VLMs. The virtual services HTTPS and IMAP are working as expected only the SMTP service not (configured by Template). The SMTP service is not balancing, it is always using only one Exchange server. If this Exchange server reboots for example, the traffic goes to the second Exchange server and stays there until this Exchange server is not available anymore.
Is this a normal behavior, if not what can I do/check?