I have renewed the self signed certificate in Exchange Server 2007 on our SBS 2008, and I found there is lots expired cert in the list. can I delete them all? and also I found in the server even log there show a error msg, is that caused by expired cert? I can receive and send email without any issue.
error msg is:
There is no valid SMTP Transport Layer Security (TLS) certificate for the FQDN of remote.xxx.com. The existing certificate for that FQDN has expired. The continued use of that FQDN will cause mail flow problems. A new certificate that contains the FQDN of remote.xxxx.com should be installed on this server as soon as possible. You can create a new certificate by using the New-ExchangeCertificate task.