I have updated my single ZCM 2017 appliance to Update 3 successfully. I then tried to push out the 2017U3 agent to a Windows 7 and Windows 10 WS. Although I set it to start at the default of 1 AM of today and to run later if it couldn't start on time, It never seemed to start. In the past, when logged into the client desktop, if I pushed out the ZCM agent, I would see the update starting in about 5 minutes. It has been a half hour and I don't see the update starting yet. I don't see the bubbles announcing the update process. I also don't see (in ZCC | System Updates) the update process proceeding.

Any thoughts?