Good Luck 😉 . We Use Vmware not Citrix. We were told by Dell Thin Os 8.6 was more in the backend for Citrix and ThinoS 9 will be more for Vmware, but as I see it in the Forum and also from Support probably more Citrix User like Vmware .
Dell wants to cover everything possible and sell many devices, so it is even more difficult to deliver good quality.