You will need to reach out to whichever company you purchase your Cisco equipment or licenses from (i.e. CDW, etc.). When you purchase them you will receive a PAK. Take the PAK (product activation key) and go to https://tools.cisco.com/SWIFT/LicensingUI/Home and register the license. You will need the License MAC of your CUCM Publisher (obtained from the CLI with the command 'show version'). After you register the PAK to the License MAC you will receive a license file that you upload to CUCM under System > Licensing > License File Upload.
For information on how many DLU's each device consumes, you can use the calculator in CUCM as well under the same licensing menu. Do not assume each phone only consumes one DLU!
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
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