[PS] C:\Documents and Settings\Administrator.domain>get-exchangecertificate |fl


AccessRules : {System.Security.AccessControl.CryptoKeyAccessRule , System
.Security.AccessControl.CryptoKeyAccessRule, System.Securi
ty.AccessControl.CryptoKeyAccessRule}
CertificateDomains : {EXCSVR, EXCSVR.domain.local}
HasPrivateKey : True
IsSelfSigned : True
Issuer : CN=EXCSVR
NotAfter : 04.04.2016 11:42:42
NotBefore : 04.04.2011 11:42:42
PublicKeySize : 2048
RootCAType : None
SerialNumber : CACBC5AC3D845DB14874E86180E4646E
Services : IMAP, POP, IIS, SMTP
Status : Valid
Subject : CN=EXCSVR
Thumbprint : F6018382B972553BDD7C7CA4466615F6835B65A9

AccessRules : {System.Security.AccessControl.CryptoKeyAccessRule , System
.Security.AccessControl.CryptoKeyAccessRule, System.Securi
ty.AccessControl.CryptoKeyAccessRule}
CertificateDomains : {EXCSVR, EXCSVR.domain.local}
HasPrivateKey : True
IsSelfSigned : True
Issuer : CN=EXCSVR
NotAfter : 13.10.2010 12:29:34
NotBefore : 13.10.2009 12:29:34
PublicKeySize : 2048
RootCAType : Unknown
SerialNumber : FCC50325266543A74AADAABFC68B09D8
Services : IMAP, POP, SMTP
Status : Invalid
Subject : CN=EXCSVR
Thumbprint : 5AC0BB3861342E49B5DF4922488873785694E28D