I’ve been asked if there’s a Group Policy based way to squelch the messages to “Reserve your copy of Windows 10” from normal users.
The answer is YES, but it’s only REQUIRED for NON-DOMAIN JOINED MACHINES.
This is the one-stop-shop for everything from Microsoft: https://support.microsoft.com/en-us/kb/3080351
There is another article from Microsoft which explains why Windows PRO machines might still get the pop-up, even if they ARE domain-joined and how to stop those machines from getting the upgrade.
The final question though is: how do you get registry items over to your NON-DOMAIN JOINED machines if you don’t want to run around to them one by one?