Question about Exchange 2007 Certificates,

I am working in a company lab practicing with client access/hub trasport servers renewing TLS certificates with this article;
http://technet.microsoft.com/en-us/library/aa998840(EXCHG.80).aspx.
When used Get-Certificate I saw two identical Certs for POP,SMTP,IMAP and IIS, saw when I used the cert cloning methode and deleted the old certs I did not just delete the one I replaced also delted the second old cert thinking it was  from a previous engineer rrunning a test. So now that I am done and my OWA is not working I wonder what I am missing. OWA was not working before so maybe need to review what certs I may be missing? Maybe the Cert I cloned had a problem, please review and offer suggestions;


Get-ExchangeCertificate | fl


AccessRules        : {System.Security.AccessControl.CryptoKeyAccessRule, System
                     .Security.AccessControl.CryptoKeyAccessRule, System.Securi
                     ty.AccessControl.CryptoKeyAccessRule}
CertificateDomains : {server1, server1.mti.com}
HasPrivateKey      : True
IsSelfSigned       : True
Issuer             : CN=server1
NotAfter           : 3/28/2016 9:44:50 AM
NotBefore          : 3/28/2011 9:44:50 AM
PublicKeySize      : 2048
RootCAType         : None
SerialNumber       : 60969A1C283642A14B59EE6E6FB14C3B
Services           : IMAP, POP, IIS, SMTP
Status             : Valid
Subject            : CN=server1
Thumbprint         : c34A4E3BA02C083F56A8CD89EB2A9E44227E8755