Hi There, We've recently updated a certificate for the domain but on some of the client, mainly vista computer it's still listing the old certificate, even after deleting the old cert, checking certs through IE the old one appeared again. I logged onto the new domain controller and checking in IIS the old certificate was no where to be seen. Am I going the write way about diagnosing this or should I be looking somewhere else? Thanks for any replies,

I would have ask here http://social.technet.microsoft.com/Forums/en-US/winserversecurity/threads Thanks

Do you have a link to a specific article?

can you tell a bit more about mentioned certificate? What a certificate you talk about?My weblog: http://en-us.sysadmins.lv PowerShell PKI Module: http://pspki.codeplex.com Windows PKI reference: on TechNet wiki

Really I'm talking about the certificate that is used when connecting outlook to an exchange server, when we recreated a users profile it said the cert was not valid, but we accepted it anyway. I need to now know how to check which certificate outlook is using.

Can you provide a screenshot of invalid certificate? It seems that you are talking about expired Exchange server certificate. My weblog: http://en-us.sysadmins.lv PowerShell PKI Module: http://pspki.codeplex.com Windows PKI reference: on TechNet wiki

Yep that's the one, I'll get some screen shots for you today, cheers,