Help With Exchange Server and Outlook Please

I am getting an error everytime i start outlook up, it is a sercurity alert telling me the name of the security certificate is invalid or does not maltch the name on the certificate.

Well the name on the certificate  is mail.domain.com but theinternal doamin that is showing on the error is servername.domain.local so the names  do not match.

My question how do i set it so i do not get this eror when starting  up outlook on users  machines within the domain.

Back  when they set this domain up for our company they had set it as domainname.local and not domain.com.

Everything works with exchange  and owa  but this is just an annoyance error that wehn opening outlook but after we click yes to proceed then it does not come back to outlook is shutdown and restarted.

To me it is not a major deal but for a few they seem to lose their shit over it:-)
mpoussonAsked:
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Simon Butler (Sembee)ConsultantCommented:
No need to get the certificate changed.
If you have the required names on it then just adjust Exchange and your internal DNS to accomodate it.

http://exchange.sembee.info/2010/install/clientaccesshostnames.asp

Simon.
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anotherjallenCommented:
Check out this article, is that the specific issue you are having?

http://support.microsoft.com/kb/940726
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alphaphaedrusCommented:
certificate name needs to match what is registered. You will need to change the name and resubmit.
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mpoussonAuthor Commented:
externally it is registered domain.com but internally with ad it is  domain.local
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