We have finished testing 14 version and on Monday i have started the upgrade process. While testing i have upgraded our SEPM server to 14 and added 14 version as Client Packages for our testing group (~10 PCs with Win7-Win10). It has upgraded successfully on all of them. Now i have added 14 Client Packages (both 32 and 64 bit) to the main group. I have always done upgrades this way and i usually do not specify any schedule and leave the default 1 day interval to update. It takes 1-2 days to fully upgrade everyone. This time it started upgrading some of the machines and stopped.
I think that stopping occured after i have installed 14 client on the SEPM server itself and rebooted the server (Basic Server protection without firewall).
How can i troubleshoot and fix this? Any logs on the server/client to investigate?