Assessing group rights in AD

My boss wants to know hypothetically where our average users can get to on our network.  I told him that the way the network is setup, admins can go anywhere.  Otherwise, you can only go where your group says you can (Marketing can only go to Marketing, R&D only R&D, %Username% only their personal folder).  But he wants to be sure.  Is there a tool that can be used to analyze AD and the OUs and groups to figure out where my users can get to (Even though I know where they can go)
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I use Active Administrator by Script Logic.  It's an awesome tool, but very pricy, about $7 per user and we have over 3000 users!  You can download the trial version and get the info you need.

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Russ_GAuthor Commented:
I have downloaded the Active Admin, ESR and Security Explorer.  Very cool tools
Glad I could be of assistance.

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