Manually removing old or outdated devices to recover licenses to be given to newer installs
1. Click the Admin Center gear icon in the upper right-hand corner of the toolbar.
2. Click Devices from the menu bar along the left-hand side of the console
3. Select the devices you wish to remove as shown below, once the devices you have selected are ready to be deleted click the delete button found in the upper right of the devices view, this is highlighted below in red.
4. Click Confirm to delete the device(s).