![]() So far you have a 'valid' xml file that will work for sure in your Test-AppLockerPolicy scenario. You guessed that the '.' is what's copied in your clipboard containing the 'distinct' nodes/lines. You will need to add the 'Rule Collection Type' as fist line and close it in last line: Now what you have to do is paste the content in an empty file. The above will Group the identical Nodes and keep only the 1st item in your Clip board. So, for duplicated 'Nodes' I used the following powershell command: $xml = Get-Content "F:\AppLocker\Win10_AppLocker.xml" -raw When the xml file in question contains around 10'000 lines, it's hard to identify duplicates or misconfigurations. xml file but it will not correct them unfortunately. The Test-AppLockerPolicy command described above will indicate that there are duplicates or missplaced items in your. On a successful Policy test you will get a Blocked or Allowed result depending on the test. This resulted in instabilities when 'allowing' or 'blocking' some files from running. In a case I worked on, duplicated 'Nodes' were mistakenly placed and not detected upon implementation. This Test-AppLockerPolicy command will show "Errors" in case something is wrong and detectable in the specified. If the applocker rule is correctly syntaxed and formated, no errors should appear. Here below an example syntax testing agains 1password: Test-AppLockerPolicy -XmlPolicy "D:\Applocker.xml" -Path "C:\Users\user\AppData\Local\1Password\app\8\1Password.exe" ![]() To test an applocker policy we use the Test-AppLockerPolicy command. When you're finished creating your rules, it's best you test them against some apps on your client devices where it will be applied on. Right click in the AppLocker and select Export Policy ! Test your policy Login in the Domain Controller and Edit the AppLocker Policy When done editing rules > Right click on ' AppLocker' > Export Rule > Save as AppLocker.xml Note: If you already have a GPO on your 'on-prem' environement, you can export it by: One for Microsoft and one for the hardware manufacturer of your devices. I recommend you create atleast 2 publisher rules along the 'default' created rules. This means nothing else will be allowed to run. So in the end the answer is not to difficult, but unless you go digging in to the fact that modern apps are treated differently by AppLocker and GPO’s will disable the service before cleaning house, then this blog may be useful.The above only shows 1 rule created. Short answer was to keep the GPO’s enabled but remove ALL of the Applocker rules, refresh the GPO’s several times until the Packaged apps start to work again and then you can remove the GPO. Turns out that when you remove the GPO from workstations the Applocker service gets disabled before it can update it’s policies so the policies remain intact. It is almost as if once the Applocker rules are applied they are never removed.Īfter a little more digging I found this article: Problem: AppLocker Rules Still Enforced After the Service is Stopped ![]() ![]() However, after removing the GPO, refreshing the GPO’s (GPUpdate /force) and rebooting several times the error still occurs. exe based rules, Windows will automatically disable ALL modern apps unless unlocked by specific AppLocker rules. These rules target the new Modern UI style apps. Under Windows 8.x and 10, the new applications require new AppLocker rules called Package App Rules. ![]() Looking at the event logs, the AppLocker event log reads: “ No packaged apps can be executed while Exe rules are being enforced and no packaged app rules have been configured” Now I know I have some AppLocker GPO’s in the environment that prevent users from running applications under their user folder (C:\User\Username) but that does not explain why these apps are not running as they are not run from one of these locations. Before they join the domain all apps are functioning fine, however, as soon as one of them joins the domain ALL the Windows 10 packaged apps stop working even the start menu (Cortana) doesn’t work and the Edge browser does not appear on the taskbar. In my lab I had newly built Windows 10 Enterprise PC’s that are joined to a domain. I know that this is not a System Center related post but I just spent the good part of 2 hours pulling my hair out over this issue so I thought I better have something to show for it at the end of it all. ![]()
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