A family of System Center products for managing incidents and problems.
Hi, the organizational unit is not imported as a separate class entity into the CMDB. Only users, printers and computers are imported: https://learn.microsoft.com/en-us/system-center/scsm/ad-ds-attribs?view=sc-sm-2022
You would need to invest in customization to achieve your goal: cerate a custom class entity for organizational unit and a customer connector or scheduled task which imports the items into the CMDB. Then you can use it in your RO.