You can edit the agent locations for multiple devices at once on the Device Manager screen.

Here is a video tutorial to add a new location to multiple devices.

To edit locations:

  1. Select the check boxes next to the devices you wish to update.
  2. Click the action button  in the header of the platform you wish to edit, and click Agent.
  3. On the agent location selection page, select locations and chose to either add or remove selected locations from the selected devices (showed across the bottom).