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As mentioned by Adharsh Santhanam , this could be a generic emailHowever, to validate whether there are classic resources running in your subscription,
- On Azure Portal Home Page. In the left pane, select "All resources".
- Click on Type filter as shown below and Filter for Classic Services (As shown in the image). This should list all the Classic resources in your Subscription.
Azure PowerShell
You can run the command below to get a list classic resource in your subscription. You can use Azure Cloud Shell to run the PowerShell commands below.
$resources = Get-AzureRMResource
$resources | Where-Object {$_.ResourceType -like "Microsoft.Classic*"}
Hope this helps! Please let me know if you have any question here or need any additional help.
Thanks,
Kapil
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