Hi Mark1Kiwi, welcome to Android Forums.
Sorry to hear you're having some trouble with Citrix. I'm not familiar with the app, but I'm wondering if maybe your organization doesn't allow it on *all* mobile platforms? I have no idea if they can make that decision, but just though it might be something to consider.
Hope that helps, and if not, I'm sure someone with more experience will be able to help out.
Again, welcome to AF!
-9to5