Hi @Michael J. Langone,
The setting you are looking for in EntraID > Device > Device Settings section.
This setting determines if the Microsoft Entra user registering their device as Microsoft Entra join be added to the local administrators group. This setting applies only once during the actual registration of the device as Microsoft Entra join.
With Local user group membership policies in Endpoint Protection (Intune) you can manage the users that are members of the built-in local groups on devices that run Windows 10 20H2 and later, and Windows 11 devices.
Best regards,
Aleksandr
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