Question : exchange certifacat

Hi ,
I am getting the following problem, and don´t know why I am getting that. I have a certifacat installed and enabled, but I still get the event id 12014, also when I visit the site in my web browser using https://mail.domain.com/owa  I get a certifacate error
Any one can help please.

Event ID: 12014
Microsoft Exchange couldn't find a certificate that contains the domain name MAIL.DOMAIN.COM in the personal store on the local computer. Therefore, it is unable to support the STARTTLS SMTP verb for the connector internet with a FQDN parameter of mail.domain.com. If the connector's FQDN is not specified, the computer's FQDN is used. Verify the connector configuration and the installed certificates to make sure that there is a certificate with a domain name for that FQDN. If this certificate exists, run Enable-ExchangeCertificate -Services SMTP to make sure that the Microsoft Exchange Transport service has access to the certificate key.
The following is what I get when I write Get-ExchangeCertificate
[PS] C:\Windows\System32>Get-ExchangeCertificate
Thumbprint                                Services   Subject
----------                                --------   -------
896B74B25F7EBF330C93E56DA2A76CFC6A7  ....S      CN=SERVERNAME NETBIOS NAME
136849A2963709E2753214BED76C7D6DB1E4A270  IP.WS      CN=MAIL.DOMAIN.COM, ...

AND HERE IS SOME MORE INFO ABOUT THE CERTS when I write get-exchangecertificate  | fl

[PS] C:\Windows\System32>get-exchangecertificate  | fl
AccessRules        : {System.Security.AccessControl.CryptoKeyAccessRule, System
                     .Security.AccessControl.CryptoKeyAccessRule, System.Securi
                     ty.AccessControl.CryptoKeyAccessRule, System.Security.Acce
                     ssControl.CryptoKeyAccessRule}
CertificateDomains : { SERVERNAME NETBIOS NAME, SERVERNAME NETBIOS NAME.DOMAIN.COM}
HasPrivateKey      : True
IsSelfSigned       : True
Issuer             : CN= SERVERNAME NETBIOS NAME
NotAfter           : 2/5/2011 10:03:31 PM
NotBefore          : 2/5/2010 10:03:31 PM
PublicKeySize      : 2048
RootCAType         : None
SerialNumber       : CED1C1111B11EAC111AC1C1111BC1
Services           : SMTP
Status             : Valid
Subject            : CN= SERVERNAME NETBIOS NAME
Thumbprint         : 896B74B25F7EBF330C93E56DA2A76CFC6A7

AccessRules        : {System.Security.AccessControl.CryptoKeyAccessRule, System
                     .Security.AccessControl.CryptoKeyAccessRule, System.Securi
                     ty.AccessControl.CryptoKeyAccessRule, System.Security.Acce
                     ssControl.CryptoKeyAccessRule}
CertificateDomains : {MAIL.DOMAIN.COM, SERVERNAME NETBIOS NAME, AUTODISCOVER.DOMAIN.COM
}
HasPrivateKey      : True
IsSelfSigned       : False
Issuer             : CN=AAA Certificate Services, O=XXX, L=XXX
                     d, S=XXX, C=XX
NotAfter           : 5/29/2013 1:59:59 AM
NotBefore          : 5/29/2009 2:00:00 AM
PublicKeySize      : 2048
RootCAType         : ThirdParty
SerialNumber       : 001111FAE711DF41E9A111F4B62E111
Services           : IMAP, POP, IIS, SMTP
Status             : Valid
Subject            : CN=MAIL.DOMAIN.COM, OU=XXX Unified Communications, O
                     U=Hosted by XXX, OU=XX, O=XX,
                     STREET=XXX, L=XXX  S=XXX, PostalCode=111
                     11, C=XXX
Thumbprint         : 136849A2963709E2753214BED76C7D6DB1E4A270

Answer : exchange certifacat

With Truecrypt (btw - visit http://www.truecrypt.org to get it) you create virtual disks the contents of which are contained in a single file (there are other options but never mind for now). So using Truecrypt either installed or portable, you need to create such a file. The size of the file and the encryption method is up to you. Then, from within Truecrypt you mount the drive by selecting a drive letter for it and the encrypted file that you've created. That drive then is available in your computer just like any other drive - lets say it's drive D:.
After you set this up, you install Dropbox normally but specify a folder inside this D: drive (or just the drive itself) as the folder you want to keep your Dropbox file in. And that's pretty much it.
When you want to leave, you close Dropbox first (since it has open file handles and locks its folders) and then you dismount the drive using Truecrypt. Once you do this, all that is left is a simple file that noone can open.
I've used this method with the exception of encrypting a full partition instead of creating a virtual drive file. But it's the same result.