To allocate a device to a specific User, navigate to the users section.

Click on the blue Edit button on the right hand side of the employee’s name and then select the Devices tab. Then click on Allocate to select a device:

When you see the window with available phones, choose a line to pair your chosen device with and then Allocate.

If you wish to edit the device, click on the Device Icon. This will open a new window and you can edit the device as needed.