Awhile back we upgraded out domain from 2003R2 to 2012R2.
The old DCs were demoted using DCpromo.
However, they are still listed in AD Computers.
When I try to manually delete them, I get the message;
The object SRV2003 contains other objects. Do you want to remove the object SRV2003 and all the objects it contains?
If you cancel the removal in process any objects removed are not restored.
WARNING: If you check the box "Use server control for removal of subtrees" all objects in the subtree are removed, including objects which are protected against removal, and the removal cannot be undone.
I turned on the view computers as containers, but see nothing inside of them. Is it safe to delete these objects while checking the box "Use server control for removal of subtrees" or could this have an adverse effect on my current Domain/DCs?