I have now setup 2 appliances one script based (AzureMigrateInstaller.ps1), another time as Hyper-V template download and both terminate the workflow at after the successful login.
Azure user login and appliance registration status
You need to Login to your Azure account to proceed. Ensure you have the required permissions on the Azure account.
Logged in as joe@Company portal .com
Error Message
Failed to register the appliance. Check the error details, follow the remediation steps and click on 'Retry' button
Failed to save configuration
Details
The check failed as the URL https://myservice7238kv.vault.azure.net is not reachable and has returned an error: 'An error occurred while sending the request.'. This can happen if you have not whitelisted the required URLs for connectivity to Azure or have not provided the correct proxy details in the configuration manager to access the URLs.
In the docs there is no description I would need to manually create a vault. The diagnosis of the web portal does not indicate any connection issue and until this step all connections and the workflows are running fine.