Hello Forum,
I am currently trying to import a public certificate on an Exchange 2019.
The import command does not show any errors. However, the new certificate is not displayed with "Get-ExchangeCertificate" or in the ECP.
However, it is visible and valid in the local certificate store.
When I try to activate the certificate with "Enable-ExchangeCertificate -Thumbprint xxxx -Services....", I get the error:
"The certificate with the fingerprint 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' was found, but is not valid for use with Exchange Server (reason: KeyAlgorithmUnsupported)."
The new certificate has the public key "ECC (256 bits)", i.e. "ECDSA" / The old, still valid certificate has "RAS (4096 bits)" otherwise the same.
After initial research, I found that Exchange does not have any ECDSA certificates are supported. Is there any way to make this possible?
Thank you
I have a similar problem, also an ECC certificate. Exchange 2016 is not supposed to support it, but Exchange 2019 is supposed to support it. But I also get the message "KeyAlgorithmUnsupported" on an Exchange 2019.
Is there any way to activate this? That ECC certificates are supported?
