Hi, I installed Exchange Server 2010 SP1 on a totally new WIndows domain. My previous experience was only with Exchange Server 2003. Thus, my cert had a single subject: mail.contoso.com. Now, I understand that for Exchange 2010, I need a UCC, which supports mail.contoso.com, ex-svr.contoso.com, autodiscover.contoso.com, etc. So I used EMC to issue a new request (CSR) for all of the requisite domains. But when I tried to submit the request to CertificatesForExchange, I got the error message: Common name mail.contoso.com is already present in a current certificate I called CertificatesForExchange support. They replied that I should remove the old mail.contoso.com cert from EMC, and then resubit a CSR. I tried that, but got the same error message. Since my previous cert was not purchased through them, how do they know I have a cert for mail.contoso.com already? What am I doing wrong? TIA, mlavie

Hi, you need to renew the other certificate or get it revoked; If you are receiving the error Specified Common Name already in use, this is because we have an active certificate in our system that has already been issued for the common name (website address) in your request. If this certificate was requested by a third party on your behalf, please contact that third party and request that they revoke the certificate from their certificate manager. If the certificate is in your customer account, you would need to revoke the certificate from within your account.If you have issues with having the SSL revoked, you may want to contact our SSL support team . Thanks

I think that anyone who reads this message should realize what I eventually deduced: that many of the SSL cert "brands" are in fact the same underlying company/infrastructure. Due to that, the CertificatesForExchange system "saw" an SSL issued by a different authority...