Quickie: How to make a .iso file with native tools on Windows 11.

Step 1, Install and download the Windows ADK from Microsoft, selecting "Deployment Tools".

Step 2, At a command prompt:

"C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Deployment Tools\amd64\Oscdimg\oscdimg.exe" -n -d -m "c:\sourcefolder" "c:\destination\filename.iso"

I've figured this out and forgotten it enough times that I wanted to write it down for next time.