Making an installable ISO of Bootcamp drive
I would never attempt to handle any aspect of Boot Camp partitioning or data structuring from inside Windows.
Windows has no idea its partition is balanced precariously on a 'fake' MBR disk sitting inside a GUID partition. Too many people touch it &amp; break it.

Instead I would use something designed specifically for Boot Camp installations within the Mac environment. That way you're not tightrope-walking.

As far as I'm aware, Paragon Hard Disk Manager is the only app that can do the task in its entirety, handling Boot Camp &amp; Mac partitions - move, backup/restore etc. 

TwoCanoe's WinClone can do the Boot Camp partition, but doesn't handle the Mac partitions.

Carbon Copy Cloner is great for your Mac Partitions, but not Boot Camp. It requires you already have the specialised partitioning structure in place - see Bombich KB: Can CCC back up my BootCamp (Windows) partition?

I own all three, but am not affiliated with any of the recommendations