WARNING...this process changes the REGISTRY which can cause issues if something is set incorrectly. Review and test before deploying. We have tested on several machines with ArcGIS 10.2-10.5.1, both physical machines and virtual, desktop win7 and MS Server 2008 and 2012(?).
This is to help others that are needing the same, but please take time to understand what it is doing, and modify for your organization as needed.
History and cause: Over the past few years, our agency's IT have been working on tightening up security, which means removing the local admin permission for many users/user-machines (btw - helpful even for those with admin rights). For ArcGIS, we have concurrent-use licenses that are divided between three license manager machines. Each machine has a different configuration of available licenses.
