Hi Paulo,

Just to be clear - your variables have your own GUID and Name, so your variables are "common" Authenticated Variables, correct? What exactly is failing in your case:

* You cannot write your variable first time, so it does not get created?
* Or you can create, but cannot update after it's been created?

I seem to be able to create my Authenticated Variables on a number of production devices, including Dell, but then these variables cannot be deleted. I see exactly why deletion does not work - bug https://bugzilla.tianocore.org/show_bug.cgi?id=2374 , but this issue is specific to deletion only.