Certificate mismatch error for outlook users 2007

I am running exchange 2007, just replaced the expired default certificate with a godaddy, which I understand 3rd party certs now do not have internal domain names...  that seems to be why outlook throws up a certificate error with the mismatch.. I have already tried the 4 lines of script to change Cas server info, am I missing something because I still get the certificate popups..
advantagecAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
I have outlined this in one of my HowTo's You need to configure Split DNS and also configure your internal URL's to match the external ones.

See my HowTo below...
http://www.wsit.ca/how-tos/exchange-server-2/configure-split-dns-and-exchange-2013-virtual-directories/

The screenshots outline Exchange 2013 but the process is virtually the same minus the Set-MapiVirtualDirectory

Will.
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Amit KumarCommented:
Is it happening with internal users or external users?

If Same URL is published on internal and external URLs then certificate should contain  OWA URL name as CN or in SAN.

In case you have diff. URLs in internal and external so add internal names and external names both in SAN.
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advantagecAuthor Commented:
Internal users only and yes internal domain name is different than external
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Will SzymkowskiSenior Solution ArchitectCommented:
Internal users only and yes internal domain name is different than external

That is exactly why your users are getting this error message when the launch Outlook. Just follow my HowTo and it will help correct this issue configuring Split DNS and Internal Virtual Directories.

Will.
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MAS (MVE)EE Solution Guide - Technical Dept HeadCommented:
In addition to the above please make your internal and external URL the same.
Please check the below article to the same.
http://www.experts-exchange.com/articles/13676/Out-Of-office-not-working.html
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advantagecAuthor Commented:
worked perfectly!
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