After it fails while you are still in WinPE tell me if you can browse the C drive through the command line.
Yes I can browse the C drive.
Historically there were a few issues with the configure target OS action, that lasted up to 8.8 SP2. I suspect they have been fixed in SP6 for 8.7, however you may want to have a look at this:
- If you are using a cmdlines.txt as part of your sysprep process, there was an issue with CTOS not being able to append the lines to add the provisioning client install correctly. I found that deleting the cmdlines.txt and moving the stuff installed there into a batch file kicking off at GUIRUNONCE in sysprep was a workaround. As a test, delete the cmdlines.txt as an action before running CTOS and see if it gives you more luck.
- Enable debug level logging on the core server's provisioning log. Change the loglevel.ini file in the logs\provisioning directory.
I hope this helps~ Either way, it may merit opening a ticket with the factory.