Can't upload an SSL certificate to Azure WebApp

Question

I'm trying to upload my SSL certificate (a .pfx file), but I got the following response:

At least one certificate is not valid. Certificate failed validation because it could not be loaded

That's strange because this certificate was issued a few hours ago, and it looks totally OK if I add it to the Certificate Manager on Windows (see the screenshot below):

Answer 1

The reason for the error could be the certificate is not meeting the azure webapp requirements. You can try the following steps to resolve the issue.

• Re-encrypt the pfx file in a windows machine so that you can encrypt the file using a password. Use the following command in PowerShell. Use a preferred password

Import-PfxCertificate -FilePath "path" -CertStoreLocation Cert:\LocalMachine\My -Password (ConvertTo-SecureString -String 'password' -AsPlainText -Force) -Exportable

• Up on successful completion, you will find a thumbprint. Copy the thumbprint and use it in the following command to export the certificate

Export-PfxCertificate -Cert Microsoft.PowerShell.Security\Certificate::LocalMachine\My\<thumbprint> -FilePath 'newPfxcert.pfx' -Password (ConvertTo-SecureString -String 'password' -AsPlainText -Force)

The exported certificate should be usable in app services without any issues.

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