Remove deleted Certificates

Hi

since a couple of weeks i have following warnings in one exchange 2016 CU21:

[Source]  MSExchangeFrontEndTransport 
[EventID] 12023 
Microsoft Exchange could not load the certificate with thumbprint of XXXXXXXXXXXXXXXXXXXXXXXXX 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 XXXXXXXXXXXXXXXXXXXXXXXXX -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 XXXXXXXXXXXXXXXXXXXXXXXYY is being used.

How can i remove the inexisting certificate? (i think it was deleted by the autoenroll/renew Process)

Thanks an Greetings

floWinkel