I have a trade certificate installed on my server that corresponds to the Webmail (http://www.webmail.mydomain.edu).
I need to install a new certificate for the MTA (mail.mydomain.edu) for the emails used via Microsoft Outlook.

You can do this setting? How? I'm afraid I do WebAdmin and even overwrite the previous certificate (http://www.webmail.mydomain.edu).

Already, thanks for the help.