Exchange 2007 Certificate Principal Name issue

I have upgraded our Exchange certificate to an multi-domain cert, the origional principal name on the certificate was mail.domain.com. When I created the new certificate i changed the principal name to domain.com with the sub-domains as mail.domain.com, domain.com, autodiscover.domain.com.
Since I changed the CN I have had to change all the clients Exchange proxy settings to msstd:domain.com, from msstd:mail.domain.com. But for some reason the Exchange server is pushing out mail.domain.com and causing these clients connection headaches, is there anyway to change that without causing any further connection problems nor changing the CN?
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progjmAsked:
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MesthaConnect With a Mentor Commented:
Why did you use domain.com for the common name?
The root domain is usually pointing to the public web site. I never deploy a certificate with the root of the domain for that reason.

Have you changed the FQDN field for Outlook Anywhere?

Run this command (changing EXCHSERVER to your Exchange server's real name)

Get-OutlookProvider -Identity EXCHSERVER | fl

Look at the values for certprinciplename. If that is set to the wrong URL you will need to correct it.

Set-OutlookProvider -identity EXCHSERVER -CertPrincipalname msstd:domain.com

However ideally I would be looking to change the common name on the certificate.

Simon.
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progjmAuthor Commented:
There is no data in the CertPrincipalName, server area is blank also.

I had to run this command Get-OutlookProvider  | fl
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MesthaCommented:
Try setting it as I have outlined, after checking that you have changed the Outlook Anywhere setting.

Simon.
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progjmAuthor Commented:
Will do, I may also change the certificate as you stated
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