In order to complete certain services, UIT may require you to remove your device from your Apple ID temporarily.
Sign in to icloud.com, then select the Find My icon.
From the All Devices panel, select the device you want to remove from your Apple ID. On mobile devices, you may need to click "All Devices" at the top.
Select the device to find its details.
Select Remove This Device. Then you will be able to give the device to UIT for service.
Once UIT has returned your device, sign back in to reassociate it with your Apple ID.