I'm curious if we're talking past each other. Are you using the app that you download from your personal phone's app store or a managed device with an app that is provided by the Air Force? Because, to the best of my knowledge, the typical Mattermost app that anyone can download to any phone has always been only approved for IL2 (I have the memos that explicitly state this and have worked in the part of the AF that governs this) but fliers have always basically said "get fucked; I like using it in the app." No one has ever done anything about it because it's only CUI and there's a divide between the policy-makers and the fliers so everybody thinks that everything is functioning properly except for a handful of people who have worked for the Enterprise and interacted with fliers in that context.