This is using MS Exchange Server 2016, is a new setup and now in full production. Last time, we used to have an older exchange server 2013. We setup this new 2016 exchange to coexist and then migrated all mailboxes to this 2016. Now, the older 2013 server is still online, but with all exchange services off and mailbox databases removed. We are planning to uninstall and decomm this 2013 in 2 weeks time.
However, there is a little problem here. When user open outlook, they always see a dialog box states that "The name on the security certificate is invalid or does not match the name of the site. This is referring to the old server cert (using ms self-signed). I curious, why this outlook still look for this old server (for cert)? anything can be done on autodiscover setting?
Thanks in advance.