If your organization is large, you might want to implement an organizational Directory tree. Plan only the top levels, and then allow individual sites to create and administer their parts of the Directory tree.
Consider the following strategies when planning this type of Directory tree:
This strategy enables the [Root] level network supervisor to manage the whole network while providing administration duties to supervisors of each partition or local network. Local network supervisors can help build the tree by installing servers in their respective Organizational Units while being administratively restricted to their particular portions of the tree.