Connection to Azure from Powershell

[Jesus Lopez]

Where can i find the thumbprint of my subscription ID

[#2]

What do you mean by thumbprint for Subscription ID can I know more details about the issue 

You can find certificate thumbprints in Subscription --> Select the Sub -->Management Certificates 

[#3]

the connection method you are trying to use is for ASM(Classic) management only.
In the old portal you had management certificates that granted you owner permissions for that subscription.

if you are starting a new tenant avoid ASM resources.
have a look here as to how to connect https://docs.microsoft.com/en-us/azure/azure-resource-manager/powershell-azure-resource-manager