I haven't had time to test too much, but I do know that some users are getting the realm login box after logging into Windows. When that happens, I can't access ZCC. I can restart the services and ZCC becomes functional again. I update from 11.4.3 to 2017 on Friday night, then 2017 to Update 1 on Saturday. I noticed that it stopped responding Sunday and restart machine. Then it stopped again overnight sometime.

Not sure if it's related, but the Update 1 is stuck at 99%. I have a separate thread on that.

Server 2012R2
MS SQL 2014 on Server 2012R2