Need to revoke local admin rights for all users - domain-wide using GPO.

Currently users have local admin rights and this is no longer necessary.  What's the best and easiest method to change a current user who's a local admin to a regular user.  Thanks.
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LB1234Asked:
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Walter PadrónCommented:
Open the Group Policy Management console and create a new GPO

Under Computer configuration > Windows Settings > Security Settings > Restricted Groups add the local  Administrators group, if you setup the "Members of this group " portion of the policy, it will remove anything else that is listed locally. It will only apply the group that is in your policy.

** Make sure to get the "Domain Admins" group added and the policy added to computers OU

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Rob StoneCommented:
Another method is to use GPP which offers more flexibility.  This post offers a really good overview of how you can use it to dynamically assign users local admin with item-targeting or by using AD Groups.

http://www.grouppolicy.biz/2010/01/how-to-use-group-policy-preferences-to-secure-local-administrator-groups/
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