There’s a feature in MDT that displays a dropdown list of Domain OU’s in the Lite Touch deployment wizard. There are 2 ways to set it up.
First, you can create a list of OU’s in the customsettings.ini by using the DOMAINOUS variable list. This first example demonstrates this:
This example shows the other method where you create a file in your scripts folder called DomainOUList.xml and list each OU in a separate element:
The result is you now get a dropdown list button next to the Organizational Unit in the deployment wizard.
The list displays the OU’s you entered earlier making it easier to select and reduce errors during deployments.
There’s also an old post by Keith Garner here that shows how to display friendly names.