Hello -
I have an Exchange 2013 server that is kicking up Transport Delivery Errors. Seen below:
Microsoft Exchange could not load the certificate with thumbprint of F306F39ED2B90C76FD2B3356FE30547F4D90161F from the personal store on the local computer. This certificate was configured for authentication with other Exchange servers. Mail flow to other Exchange servers could be affected by this error. If the certificate with this thumbprint still exists in the personal store, run Enable-ExchangeCertificate F306F39ED2B90C76FD2B3356FE30547F4D90161F -Services SMTP to resolve the issue. If the certificate does not exist in the personal store, restore it from backup by using the Import-ExchangeCertificate cmdlet, or create a new certificate for the FQDN or the server enabled for SMTP by running the following command: New-ExchangeCertificate -DomainName serverfqdn -Services SMTP. Meanwhile, the certificate with thumbprint 4C03F3712D218B005561A7AEA703C3985A80FBB4 is being used.
The old cert has vanished. I don't know what it was but it doesn't exist in the personal store, or in Exchange. I created the new cert seen at the bottom and it appears to be using it but the errors persist. Removing the cert from Exchange doesn't work since it doesn't exist and assigning it to -Service None doesn't work either, also since it doesn't exist.
When I run Get-ExchangeCertificate I see my new cert and can see that it is assigned to SMTP, however, when I try to re-enable it by assigning it to -Services None, then back to -Services SMTP I get the following error when attempting to set it back to SMTP:
The error message is: Unknown error (0xe0434352)
I wouldn't worry too much about the errors but this morning the Mailbox Transport Delivery Service was stopped and users were not receiving mail. Anyone know how to remove the non-existent cert and stop the errors?
Thanks