Hi, A 2012 iMac is connected to a corp domain via ethernet cable. Screen sharing is configured and has been in use for remote connections from outside the building for ~3 years. In recent months, an issue has arisen where the network connection on the iMac is either lost or automatically powered down after some amount of idle time. When the user logs in at the iMac in the morning, the network is initially not connected, but immediately connects after login. This behavior is new as of the past few months, and effectively makes screen sharing for remote connections useless, as the iMac is not connected and available for screen sharing sessions. I suspect this came about from an update which may have made changes to the way Energy Saver settings handle the network connection. Perhaps the update from Yosemite to El Capitan, or perhaps another update around that time. How does one enable the network connection to remain on and connected full time? Thanks!