Pool provisioning DSC Extension error ... again

This is happening to me in two different tenants using ARM with Windows 10 Multi user with Office 365. 

Prod Tenant: I have an Express route and we use South Central Us. This keeps failing every time even when I follow well known steps from my lab.

Lab Tenant:t: South Central US was causing the Error and East US was not (same steps). This has been happening since Friday... until about an hour ago. Now I can create in South Central US in the lab.

I am still unable to do so in my Prod tenant. Something is going on seemingly with the Azure backed.

{
"status": "Failed",
"error": {
"code": "ResourceDeploymentFailure",
"message": "The resource operation completed with terminal provisioning state 'Failed'.",
"details": [
{
"code": "VMExtensionProvisioningError",
"message": "VM has reported a failure when processing extension 'dscextension'. Error message: \"DSC Configuration 'CreateHostPoolAndRegisterSessionHost' completed with error(s). Following are the first few: PowerShell DSC resource MSFT_ScriptResource failed to execute Test-TargetResource functionality with error message: Windows Virtual Desktop Authentication Failed, Error:\n\r\n\r\nException : System.AggregateException: One or more errors occurred. ---> System.InvalidOperationException: \r\n Showing a modal dialog box or form when the application is not running in UserInteractive mode \r\n is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to \r\n display a notification from a service application.\r\n at Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.Platform.WebUI.<AcquireAuthorizat\r\n ionAsync>d__16.MoveNext()\r\n --- End of stack trace from previous location where exception was thrown ---\r\n