Recently I did a migration from Exchange 2003 to Exchange 2013 (via Exchange 2010). Everything works except for certificate problem with Outlook but ONLY for internal users (see attachment, it's in French sorry). Even though there's this error, Outlook connects to exchange server & everything works.
Error in EN is "The server name on the security certificate is invalid or does not match the name of the site"
We bought a Wildcard certificate (on public name of course which is *.xxxxxx.fr) & succescfully imported to the exchange server.
We have two seperate DNS zones, one internal zone in .local & other external (public) zone in .fr
In the external zone, I have two "A" records which redirects to exchange server.
autodiscover.xxxxxx.fr ->> Exchange server IP
mail.xxxxxx.fr ->> Exchange server IP (for Webmail)
In exchange server settings, OAB, ECP & OWA internal & externe URL are set to external URL
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