We use AD to authenticate our users for login. The users should be made local admins during the account creation (when they 1st login to the Mac). In the district this works fine. When the user gets a admin prompt they can user their username. However, I'm hearing that when they go home, this isn't working. Does the Mac authenticate to AD each time?
A Admin User Question

Best answer by ernstcs
A lot of us would say don't make them an admin! Or at least don't automatically make everyone an admin on every computer. =D
What's been stated is correct. You likely added an AD group to your AD binding 'Allow administration by' that includes all of these users. When AD is unavailable administration from these groups is not available. As suggested users could connect via VPN so they can have the machine talk back to AD if that's an option.
If you want the particular user to have admin, on or off the network, you would need to do what Todd suggests. You could make this an option for the user to run on their own through a Self Service policy. If you're allowing any of them to do it, why not.
I'd say test this heavily before deploying, but I just tried this in my (@Jared RED) development JSS and it worked on 10.8.
#!/bin/sh
user=`ls -l /dev/console | cut -d " " -f 4`
dseditgroup -o edit -a $user admin
I used Jared's get username line and Todd's command.
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