Security Groups - How to find out the unused ones

We have a windows 2003 active directory environment. we are doing a group audition because we are migrating the AD into a new domain. My question is this : if I want to check what Security groups are actually used and which ones are not. I know it's not a straightforward thing to do. But if someone can give me some directions that willl be great. The Security groups are used to permission for :
.NTFS/SHARE
.SQL
.GPOs
.Citrix applications
.Grant local administrative rights on servers/laptops and desktops.
.Miscellineous 3rd party apps

Now how do I find out which group is actually in use and which is not. We have around 3000 groups in domain. lol
gtrivediAsked:
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Brian PiercePhotographerCommented:
Double click on the security group in Active Directory Users and Computers. Go the the Members Tab.
If there are no members the group is not in use.
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hbbw063Commented:
What do you exactely mean by "not in use" ?
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gtrivediAuthor Commented:
[quote]
What do you exactely mean by "not in use" ?
[/quote]

some groups are there AD but they may not be used anywhere. Is there any property in AD which tells me when that group was added for permissioning on Share/SQL/Local Admin etc ?
That way I will not have to migrate such groups and the new domain will be a lot tidier.
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proservisCommented:
Go to
start->administrative tools-> group policy management

There is Group Policy Modeling and Group Policy Results
setup new model or result and look at applied/denied GPOs
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LauraEHunterMVPCommented:
Unfortunately this is a tough nut to crack, because you would need to query all of your member servers, application servers, workstations, etc., to determine if a particular security group is listed in any ACLs.

The quick-and-dirty way that most of us use?  Convert it to a distribution group, then wait a few days and see if anyone complains.

A reporting tool like SomarSoft's DumpSec might also help you determine which groups are not in use: http://www.somarsoft.com/

Hope this helps.

Laura E. Hunter - Microsoft MVP: Windows Server - Networking
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Chris DentPowerShell DeveloperCommented:

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