How to configure phones to receive the latest firmware
By default, automatic updates are enabled. To very this setting, run the Set-CsIPPhonePolicy and verify Enable device update is set to true. Firmware updates will be automatically downloaded to the phones as soon as they are available.
You can also choose to manage firmware updates using a third party provisioning system. For third party provisioning system management including advanced phone customization, refer to manufacturer administration guides.
Caution: Make sure to have a single device update authority (In-band device update or a third-party provisioning server) to avoid update loops.
Call to action:
Verify that you update either via in-band update or third-party provisioning server
Evaluate if you want to take advantage of multiple emergency numbers and/or dial plan normalization