It is possible to do automatic registration of OUs to a target container within the VCRoot by using the "GPOADmin.ContinuousOURegistration.ps1" GPOADmin PowerShell script located at the following default path:
C:\Program Files\Quest\GPOADmin\Scripts
NOTE: Open the script first with PowerShell ISE editor to review parameters, syntax and examples before executing. Additionally, running the script will only register OUs that are unregistered one time only. Use Windows Task Scheduler to create a task with this script to run it by schedule.
For more information on how to use GPOADmin PowerShell commands, review the "Appendix: Windows PowerShell Commands" section in the GPOADmin User Guide:
https://support.quest.com/technical-documents/gpoadmin/user-guide/