Dear MS team, We develop kernel mode driver for our products for Windows platform. This driver then use DigiCert certificates to sign in. Microsoft has listed DigiCert certificate download link and we do follow it to get signed by Microsoft. But on this list ( https://docs.microsoft.com/en-us/windows-hardware/drivers/install/cross-certificates-for-kernel-mode-code-signing ), it show that the certificate download will be terminated by April,15 2021. I have checked with DigiCert and they said it is Microsoft's decision what will be next step. They can't provide this kernel-mode driver signing certificate any more. Therefore, this is to ask Microsoft if there is any guideline for kernel-mode driver signing certificate after April,15 2021. Thanks, Steve Chang