Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.
I understand that you are facing issues with deleting a SSL certificate in Azure App gateway.
- I suggested to delete the listener from the Portal
- However, you said that the App Gateway has only one Listener and so, we cannot delete it.
- I suggested you to,
- Check the Managed Identity, Key Vault and Certificate Secret with the latest version ?
In case you no longer have a valid certificate in the key vault, you can select "Upload a Certificate" and upload a dummy self-signed certificate, so the error goes away.
or - Delete the whole Application gateway in case you are planning to reconfigure the gateway altogether.
- You went ahead with the latter option and the issue is now resolved.
Appreciate your patience and contribution to Microsoft Q&A.
Thanks,
Kapil
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