Microsoft Exchange could not find a certifcate...

I found this message in application log.. and found a recommended solution in Microsoft site "http://support.microsoft.com/kb/555855", can anyone tell me would it affect the performance of my Exchange 2007 if I do not apply this solution to my server?  What is impact on server if I do not apply it?  I am using SSL cert for my webmail function and allow laptop computer user access to my Exchange 2007 via "RCP over HTTPS" while they are not in office.

Message in application log.
Microsoft Exchange couldn't find a certificate that contains the domain name webmail.company.com in the personal store on the local computer. Therefore, it is unable to support the STARTTLS SMTP verb for the connector Outbound_Internet_Email with a FQDN parameter of webmail.cwalkergroup.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.