Microsoft's being really aggressive now it seems. Won't even allow you to install Windows Pro without having an internet connection AND a Microsoft account? They seem adamant to keep as many people as they can on Windows 10.
Hmm, this wasn't true for me. I just did a fresh install of Windows 11 Pro, and I wasn't required to have a Microsoft account...I did however install from a Windows 11 N source, and updated the license to my Education key shortly after installation.