I have never encountered a feature for this. The only place where CUCM would even provide the option to do so would be in the model-specific configuration settings at the bottom of its Device Configuration. It was most likely removed from the firmware. Thankfully you can use 'show cdp neighbors' from the switch instead to see what phone is attached to what port.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...