This application has been blocked by your system administrator

[Martin De RomaKeymaster]

Hi *,

today ran into an interesting problem with an *.appx file. Those are know as Universal Windows App (UWP) or Windows Store app or “Metro-style app”.

The Problem for me was that we couldn’t install (or run) the app after moving clients to a new OU with different GPOs getting applied.

Well I’m the system Administrator and I didn’t know what was going on so I started checking everything what google had to offer (Smartscreen, App(b)locker, Defender…) but to no avail so then I decided to have a look at all the GPO Settings and stumbled upon this:

After reading the Description I unpacked the APPX-File and had a look at the AppxManifest.xml just to find this:

So if you are happening to have the same issue as me. Just check if the GPO-Setting is set and save yourself some time googeling for stuff that won’t help you in this case.

Cheers.

[Author]

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