I was able to resolve the double login issue by doing the following: apt-get purge lightdm apt-get install lightdm then running horizon-optimizer.sh again answering all 2's to the questions. Ryan- Please integrate this fix into your next OVA. You probably only need to purge lightdm before you rebuild. When you generate the OVA please use CLI option: --shaAlgorithm=sha1 so us C# people can still use it. Thanks for all your hard work on this, I never would have been able to tackle an AD-integrated Horizon Ubuntu workstation myself!