Hello and welcome edwpat,
In order to help you, you need to add more information about :
- EX-100 version
- EX-100 architecture (x86 or x64)
- Windows ISO architecture (x86 or x64)
- Windows ISO edition (pro, home, ...)
- Windows ISO version (19H1, 20H1, 20H2, 21H1, ...)
- the list of services you activated, or even better if it's possible to share your wccf in the forum
Thank you very much.
PS : if it's an insider build for 21H2, the support is still unofficial (the official iso are not yet released by MS) so using it may introduce troubles (from minors to severe)
EDIT : TOPIC MOVED TO HELP FORUM