The biggest problem that we are experiencing is after the reboot notification. The process kicks off fine notifying the user that an install is ready. The user clicks the Install Now button and it does take up to two hours until the user receives the Reboot Notification button. The upgrade from 1909 to 20H2 must be significant to take this much time and I am worried what would happen if they shut down the computer within that two hour upgrade period.
But, back to the Reboot notification. When the user finally receives this, and clicks on Reboot Now, it can take up to 45 minutes to actually reboot the PC. If they get bored waiting and perform a standard Windows reboot, that’s when it completely screws up the PC–the PC thinks it has two separate installs of Windows 10.
So, you can see why I am a bit nervous about rolling this out on a large scale. There are several points where users could do things I don’t want them to do.