[hack3rcon]

Hello.
How are you?
In our company we have some departments and each department has an administrator. We have an Active directory and like to dedicate each departments. For example, The administrator of department A just can manage his/her users and can't manipulate other departments users and...
Any idea for lunch it?
Thank you.

[itbatman]

The simplest thing to do is to use standard delegation of control in AD. It really depends on what specific tasks you want to accomplish. If that's not enough for you, you can go for AD management tools (something like Adaxes or similar) that have RBAC and web interfaces that managers can use to control their users.

TL;DR you need to be a bit more specific about what you want to accomplish.