To disable User Access Control (UAC) using Group Policy, in Windows 2012 domain controller:
Open the Server Manager Console,Click on Tools in the upper right corner > Click Group Policy Management from the drop down.
Expand Forest –> Domains –> domain name in the left pain. Right-click on the domain name and select Create a GPO in this domain, and Link it here… Name the GPO something intuitive, like “UAC Mgmt” and then click OK.
The new GPO will appear in the list. Right click on it and select Edit…
Expand Computer Configuration –> Policies –> Windows Settings –> Security Settings –> Local Policies –> Security Options:
User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode: Elevate without prompting
User Account Control: Detect application installations and prompt for elevation: Disabled
User Account Control: Run all administrators in Admin Approval Mode: Disabled