Hi Paulo,<br /><br />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:<br />
<ul>
<li>You cannot write your variable first time, so it does not get created?</li>
<li>Or you can create, but cannot update after it's been created?</li>
</ul>
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&nbsp;<a href="https://bugzilla.tianocore.org/show_bug.cgi?id=2374">https://bugzilla.tianocore.org/show_bug.cgi?id=2374</a>, but this issue is specific to deletion only.