Oh it’s finally okay, I didn’t let enough time to my PC to reboot a second time after the deployment to add him on the AD. It works when i let the OU field blank but there is a new problem now : how can I join an OU under another OU ? I want to put my computer in "SERVER/Classrooms/Room#'. So i register this : OU=Classrooms,OU=Room#,DC=TEST,DC=local but it doesn’t works. When i register OU=Classrooms,DC=TEST,DC=local it works but this is not the folder that i want… So what i should i do to reach this “Room#” OU?
And my question about hidding the boot menu is still available!
Thanks!