Error when adding Managed Certificate to webapp: Parameter Thumbprint is null or empty

Question

Error when adding Managed Certificate to webapp: Parameter Thumbprint is null or empty

Mario Lessard 10

I am trying to add a binding to a custom domain on my webapp. I choose to generate a managed SSL certificate and I get the following error. What can cause this?

Successfully create App Service Managed Certificate, but failed to configure SSL binding for ... due to error: Parameter Thumbprint is null or empty.

User's image

"{\"Code\":\"BadRequest\",\"Message\":\"Parameter Thumbprint is null or empty.\",\"Target\":null,\"Details\":[{\"Message\":\"Parameter Thumbprint is null or empty.\"},{\"Code\":\"BadRequest\"},{\"ErrorEntity\":{\"ExtendedCode\":\"51011\",\"MessageTemplate\":\"Parameter {0} is null or empty.\",\"Parameters\":[\"Thumbprint\"],\"Code\":\"BadRequest\",\"Message\":\"Parameter Thumbprint is null or empty.\"}}],\"Innererror\":null}",

0 comments

1 answer

Your answer

Answer 1

Grmacjon-MSFT 19,511 Moderator

Hi @Mario Lessard we're sorry to hear you're facing this problem. The error "Parameter Thumbprint is null or empty" when trying to add an SSL binding with a managed certificate in Azure App Service means that the system is trying to create the binding before the certificate has fully provisioned and its thumbprint has been generated. This is a timing issue.

After you request a managed certificate, it takes some time for Azure to provision it, issue it, and make it available. This process can take anywhere from a few minutes to, in rare cases, a bit longer. If you immediately try to create the binding after requesting the certificate, the thumbprint won't be available yet.

We suggest waiting a few minutes (10-15 is usually sufficient) after requesting the managed certificate before attempting to create the SSL binding. Refresh the App Service's "SSL/TLS settings" page in the Azure portal to check if the certificate's status has changed from "Creating" or similar to "Issued" or "Ready."

Mario Lessard 10 Reputation points

2024-12-20T14:55:52.03+00:00

Hello, thank you for your answer.

I found the problem and it was unrelated to this. It turns out there was an existing managed certificate in my account that was generated for a webapp with the same name that had been deleted in the past. The certificate was not visible anywhere in the list of resources, except directly in the resource group with the "Show hidden resources" option checked.

It seems the portal always uses the same name when generating a certificate and it was failing because the name was in use. Took me a while to figure this out as the error is really not clear.
Grmacjon-MSFT 19,511 Reputation points Moderator

2024-12-20T18:19:50.7133333+00:00

Got it, thanks for sharing the solution that worked for you.

Share via

Error when adding Managed Certificate to webapp: Parameter Thumbprint is null or empty

1 answer

Your answer