I would not actually recommend configuring a Windows 10 IoT Core system and then capturing it (you should use the provided build system), but if you were trying to capture a demo or replicate a problem, there is a way to capture to a FFU as of Windows 10 1709 or later.
The basic version is to boot to WinPE and use DISM to capture to an attached USB stick or mapped network drive.
The addition of the "capture-ffu" switch is where the magic happens:
DISM.exe /capture-ffu /imagefile=R:\MyDemoImage.ffu /capturedrive=\\.\PhysicalDrive0
I recently had a fun time diagnosing a weird deployment error in the following environment: ASP.NET Core 2.0 site hosted on AWS EBS VS 2...
I've been following the Meltdown and Spectre news since last week since it was just vague mentions on lkml and speculation on twitter. ...
I have a lot of tiny Windows and Linux device spread about my lab/offices. I acknowledge my problem with buying a Raspberry Pi every time...