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Exchange 2010 - Outlook clients receiving an error stating  "The name on the security certificate is invalid or does not match the name of the site"

Ollie Branche
Last Modified: 2016-04-20
I have an in house Exchange Server (Internal name DC01 - local IP FQDN mail.mydomain.com
Remote users access the Server via Http and have no issues connecting and do not receive the certificate error. They have the following settings.
Server mail.mydomain.com
username  the user's ID
Proxy settings
https  mail.mydomain.com
basic auth

Internal users receive the error message with the following settings
server dc01.mydomain.local
username  user's ID
no proxy settings.

Internal DNS A record  mail.mydomain.com points to the IP address of the Exchange server
Does anyone know how to resolve this issue with OL.

Thanks in advance
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