If there is a change in your account structure, you may need change a device's assigned business unit or location. By default, a device is set to your account business unit. A location is an optional setting, which maybe used in large organizations spanning across multiple buildings or geographic areas.
Go to Devices > Clocks.
Select the Name link of the clock.
Select Show Advanced Options.
From the Business Unit or Location setting, select an option from the drop-down menu. A location is an optional setting.