There's no built-in Group Policy setting that can change the local administrator's password for you.
There is a Group Policy Preference (GPP) that can do it for you
Changing the local Administrator password on domain members has become pretty easy with the advent of Group Policy Preferences.
Start the Group Policy snap-in, expand Computer Configuration, expand Preferences, click Control Panel, and then right-click Local Users and Groups. From the menu select New - Local User. Select Update as the action, type Administrator into the User name text box, then type the new password into the Password text box, confirming the password in Confirm Password text box. Press OK.
That means that you don’t have permission to go there and do anything in that area. Your best bet is to work with your organization and get this fixed because nobody’s going to be able to tell you what’s going on With any degree of certainty