We had this problem as well due to our CUCM being linked with Active Directory (and using email address as the UserID) - makes it easier for users to log into the user portal etc.
Our deployment is a little bit old now, however the only way we found to get around this was to populate the telephonenumber field of AD with the Directory Number, and then build a custom Extension Mobility App - which would allow users to log in with their DN (telephonenumber) + Pin.
The App is hosted on CUAE (which is end of life now I believe) so wondering if there is a better way around this now?
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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 ...