How can I provide my Helpdesk access so that they can utilize Active Directory with limited privileges?

Is there a free tool or is there a way to create a UI for my Helpdesk so they can have the ability to look at the AD tree?  Or if there is no such way, how should I assign limited privileges so that they can only view users, view computers and it's OU, etc.?

AD environment is Server 2008 R2 Standard.
joukiejoukAsked:
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David Johnson, CD, MVPOwnerCommented:
many ways.. restricted group comes to mind immediately.. now you have to edit permissions either in ADSI or in ADUC
Bryant SchaperCommented:
there are tools, take a look at admanager plus from ManageEngine
joukiejoukAuthor Commented:
Are their any free tools?
SandeshdubeySenior Server EngineerCommented:
You can delegate rights in AD and install adminpak(Winxp) or RSAT(Win7) on non admin workstation so that they can manage the same from PC instead of login to DC.

Active Directory rights delegation – overview
https://kpytko.wordpress.com/2012/05/16/active-directory-rights-delegation-overview/ 

How to Delegate Basic Server Administration To Junior Administrators  
http://support.microsoft.com/kb/555986

Best Practices for Delegating Active Directory Administration
https://www.microsoft.com/en-in/download/details.aspx?id=21678

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joukiejoukAuthor Commented:
OK, I will take a look at all these.
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