D365FO Document attachment file deletion on Azure storage

Hi,

Anyone knows how to check if D365FO actually deletes the physical attachment files when we delete the attached documents (DocuRef records)?

I have tried to test this in my Dev VM, after setting the remove field to "Document and physical file" for the document type that I use.
However when I delete the DocuRef record, the physical file doesn't get removed (I checked the file  in C:\Windows\System32\config\systemprofile\AppData\Local\AzureStorageEmulator\BlockBlobRoot)

Is that just because it's using Azure storage emulator and thus it will be able to delete the file when using the real Azure storage?

I tested this using July 2017 release and PU12.