troubleshooting Question

Outlook 2007 using incorrect certificate, can't remove certificate?..

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DavidBCS asked on
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I have an issue that is only effecting 4 clients, all of which are using Outlook 2007.  3 weeks ago we migrated the server from 2003 to 2008 SBS.  We created a self signed certificate (, and this cert that shows up as the one in use in the SBS console.  
When these 4 PC's with Outlook 2007 open the email client it popups up with a security warning that the 'name on the security certificate is invalid or does not match the name of the site'.  At the top of the warning box is a certificate for  which was their old certificate.  So we have tried downloading the correct certificate many times and it says it's successful.  from the warning box i can choose 'view certificate' and install it that way - successful.  Yet if you close and open outlook the security warning comes back.  So we then went in to the certificate manager and looked for and could not find it anywhere in there.  so i downloaded the cert from the server and installed it through the certificate manager and it also says successful.  yet if you close and reopen outlook the exact same message comes back.  ive searched all over the computer for the certificate and i can't find it anywhere.  it's like it's bound somewhere to outlook.  so we've tried creating a new outlook profile and still get the exact same results.  yet this doesn't happen to any clients using outlook 2003.  Short of trying to uninstall/reinstall outlook 2007 or try creating a new user profile on the PC i'm out of suggestions.  if i can avoid a reinstall or recreating a user profile i'd much rather that.  i have yet to find anything online tha twas of help.  
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