The Admin Mode PIN can be viewed or updated at any time from the Device Fleet section of your Device Manager dashboard.
To view or change your PIN:
From Device Manager, click Device Fleet.
Find the headset you want to update and select it, then click the Settings tab from the fly-out menu.
Under PIN Settings you'll see the current PIN.
To change your PIN, delete the current number, enter a new four-digit PIN, then click Save.