How do you setup a GPO to set Local Admin groups for all workstations

Hello -

I have a root domain with three other child domains with transitive trust from root to all other child domains. Each child domain trust back to root. What I am trying to do is setup all computers within our domains our SCCM CPA account as local admin, again on all systems. I am trying to do this as a GPO. I am running Server 2012 R2 for our DC. Can someone shine some light on how I can successfully do this?

Thank you so much!
Jaime CamposAsked:
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Peter HutchisonSenior Network Systems SpecialistCommented:
You need to use REstricted Groups feature in Group Policy. See Computer Configuration, Policies, Windows Settings, Security Settings, REstricted Groups. Add all the users and groups that need local admin right e.g. Administrator, Domain Admins and so on.

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