Upload Certificate to existing Azure App for Connect-PnPOnline

[rajarshibhargav]

Can someone help with the steps required to upload a certificate to an existing Azure app and use it for authenticating Connect-PnPOnline?

I have an app APP1 which can Connect-PnPOnline using CLientID and Secret. I want to do certificate authentication, so I followed the following steps:

1. openssl req -newkey rsa:4096 -x509 -sha256 -nodes -out 3years.crt -keyout 3years.key

2. Upload crt to APP1 in azure portal .

3. openssl pkcs12 -export -out new1.pfx -inkey 3years.key -in 3years.crt

4. PS /app> Connect-PnPOnline -Url "https://dummy-admin.sharepoint.com" -ClientId "APP1" -Tenant dummy.onmicrosoft.com -CertificatePath ./new1.pfx

5. PS /app> Get-PnPTenant Get-PnPTenant: The remote server returned an error: (401) Unauthorized.