Based on a post from a day ago -- http://www.tenforums.com/tutorials/1964-users-folder-move-location-windows-10-a-post305666.html#post305666
Just wanted to let you and everyone else know that I was able to upgrade from windows 8.1 pro, with user files on D:\ , to windows10 pro without any problems. Windows 10 just installed and when it was finished everything was just as it was before. I've been playing around with programs and apps and everything seems to be working fine.
It appears that there is not a need to move user files back to C:\ before upgrade.
Which would be excellent news -- the restriction never made any sense to me, and while we could always relocate the documents/etc folders, there's a TON of data in Roaming/etc that easily fills an SSD.
In your case, it seems there are only three machines and you're happy to temporarily change their domain status, which you've already tried to do by changing this setting:
<EnableDomainJoined>false</EnableDomainJoined>
But as you've found, this doesn't cause the upgrade offer to pop up in the system tray.
Instead, simply remove each machine from the domain, and re-add it to the domain once you've registered for your upgrade.
First check you have the relevant Windows Update installed (KB3035583) by typing the following at a command prompt:
wmic qfe | find "3035583"
You should see some output showing that you have KB3035583 installed:
http://support.microsoft.com/?kbid=3035583 XXXXXXXXX Update
KB3035583 NT AUTHORITY\SYSTEM 5/24/2015
If the command returns nothing, you don't have KB3035583 installed and until you do have it installed, there's no point proceeding with the rest of these steps.
Assuming you have KB3035583 installed, now remove your computer from the domain by putting it in a workgroup, and reboot. (Before removing it from the domain, remember to make sure you have the credentials of the local administrator, as you'll need able to log on to the local machine after the reboot.)
Directly on rebooting, the Windows 10 notification appears obligingly in the system tray:
Now you can click the notification and go through the dialogs...
...to reserve your upgrade.
Once you're done with the Windows 10 dialogs, re-join the computer to the domain.
EDIT for July 29: don't forget, all GWX does initially is the compatibility check on your computer. Regardless of whether you use GWX, you are still eligible for the free upgrade anytime during the first year per the MS terms. If you don't want to wait for the automatic phased download by GWX to complete (or the automatic download by Windows Update, for those who didn't run GWX or are no longer running it), you can download Windows 10 now:
Best Answer
Patience…
The servers are trying to roll out to several hundred million users. Your turn will come.
If you really can't wait, you can force the upgrade by getting the Media Creation Tool & running the install manually from a USB stick.
From comments…
Don't try to install by booting from the USB stick, as this would invalidate your free upgrade & you'd need a true Windows 10 key to install.
Without that key, it will reject the install & tell you to run it from inside your current working OS instead - by booting as normal, then running the setup.exe on the stick.
That way, when you get to the install key window, you can skip it & it will authenticate based on your existing install.
The USB stick isn't compulsory - if you have only a single machine to update, you can just run the tool straight from that computer. The USB stick saves multiple machines needing multiple 4GB downloads.
The options are something like [not verbatim]
'Upgrade this machine' & 'Upgrade another machine'
'This' will download & upgrade just that machine, 'another' will allow you to construct a bootable installer on USB, which can be run at boot, or from a running system.