Thank you for posting in Microsoft Q&A forum.
1,Please help check the smsts.log, bdd.log and WPEinit.log on the client to see if there is any useful information.
2,Do all the Gen9 computers fail to OSD? Could you please share the error screenshoot?
Thanks for your time. Have a nice day!
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.