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Exchange 2010 Outlook 2010 Cert Error Message

Our Exchange has a UCC SAN CERT for mobile users.  When the Cert expired, one of our admin deleted the Cert and purchased a new one.  He did not add our local domain names to the Cert.  Now, Outlook gives the error message stating the Name on the Cert does not match.  The users say ok to the message and all is well until you open Outlook again (very annoying); however, the mobile users are working fine.

I have tried several of the articles on here to which you point the CAS, OAB, ActiveSync and so forth using the Exchange Mgmt Shell to the new cert; however, none have proven to resolve my issue.  

Would the best solution be to get a new Cert with our local domain names added and install it?
Thank you for any help.
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fjkeith
Asked:
fjkeith
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1 Solution
 
imkotteesSenior Messaging EngineerCommented:
Yeah better to get a new one which includes your local domain names...
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Suliman Abu KharroubIT Consultant Commented:
I would rekey the certificate to include all required names.
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Simon Butler (Sembee)ConsultantCommented:
I would have to disagree about getting the SSL certificate reissued to include the local server name, because that method isn't going to be valid soon as the SSL providers will not issue a certificate for internal names.

You need to setup a split DNS system so that the external names resolve internally, then change Exchange to use the external names internally.

I have outlined exactly what needs to be changed and where on my web site:
http://exchange.sembee.info/2010/install/webservicesurls.asp

It includes a link to the split DNS setup guide as well.

Simon.
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