When we copy a plugin to the above directory, they still need to be enabled for each user by going to Windows > Preferences > Extensions and checking the plugin. In Sketchup 2015, once we copied to the plugins directory in C:\ProgramData, it would automatically be enabled for each user. Any ideas on how to fix this?
I believe this is a known issue that was inadvertently introduced along with the extension signing mechanisms in 2016. Hopefully it is on the short list for correction in a maintenance release…