There is really no issue, but before I extend the name space, I wanted to know what is the behavior and/or best practice.
Yes you are correct about the OU, when the VDI is provisioned it is a member of the saem OU always.
But we have different OUs where we have to add the Computers manually in order to apply the correct FW settings.
Your answer greatly explains how the system works and now I can extend the name space with confidence and most important - with no surprise
Thanks again for your precious help.