One of the new features of Windows 10 is the ability to upgrade editions from the Pro to Enterprise by running a few command lines. I had been running the Pro version of the Windows 10 Technical Preview and needed to use Direct Access so instead of re-installing Windows 10 Enterprise I just ran the commands to install the Enterprise product key and then ran the DISM command to upgrade my edition. It worked like a champ and as soon as I rebooted I immediately connected up to Direct Access. This all worked wonderfully until Build 10041 was released. I wanted to upgrade however Windows Update kept failing when trying to download the new version. At this point I could have given up and waited until Microsoft released an ISO of 10041 Enterprise but I don’t like to wait so I downloaded the 10041 Pro ISO from the Windows Insider web site and then extracted out the ISO to a folder on my machine. I then performed the following steps:
1. Mounted the install.wim with mount-windowsimage to c:\mount
2. Ran the command Set-WindowsEdition -path c:\mount -Edition Enterprise
3. Ran dismount-windowsimage c:\mount -save
Now I have 10041 Enterprise installation files! From there I just ran setup.exe and succeffully upgraded my machine to 10041!
Since I haven’t seen this documented anywhere I can’t guarantee that this is supported yet but thankfully it worked for me.