I have an issue. I was on Active Administrator v7.0 for many years. Then I started adding 2012R2 domain controllers to my 208R2 level domain. I didn't realize it until I recently added a 2016 server, but I have not been getting changes that take place on any server but the 2008R2 machines. I was told by tech support that it was probably the version, so I upgraded to V8.3. Have you guessed? Yep, same issue. still not getting notifications. I am getting agent uninstall, install, server down and server up notices though. I also checked the event logs of the servers and found that the changes are being written to the logs.