Controlled Folder Access configured in Intune not being enforced on W10

Copper Contributor

Hi All. I am working on enabling CFA on some machines and started with some test VMs at first. My ten I created the ASR rule, enabled Controlled Folder Access and assigned it to a group to which my test VMs are members of. 

Screenshot 2023-07-19 at 14.11.21.png

When checking in PowerShell, CFA is enabled on the machine:

Screenshot 2023-07-19 at 14.37.35.png


I am then using the test ransomware from the Defender Test Ground that encrypts files in C:\Demo. The issue I'm facing is that the ransomware encrypts the files, even though CFA is enabled. What am I doing wrong?  Thanks. 



3 Replies



I ran into that too. It looks like the CFA test tool is now a trusted application and can therefore write into protected folders.
You could remove PowerShell as a protected application and use a PS command to create a file in a protected folder, e.g.


Write-Output "CFA Test File - Can be deleted" | Out-File -FilePath "$($env:USERPROFILE)\Documents\CFA-test.txt"


CFA should block this.

@am1357, thank you for the answer. Do I need to remove PS as a protected application at a device level or can I do it from Intune? It shouldn't have any other negative effects on running PS I guess, right?

@The737 It should be possible to remove that from the device itself using


Remove-MpPreference -ControlledFolderAccessAllowedApplications "PS PATH"