This came up the other day and I thought it might be helpful to some people. To add new licenses to a Cisco call manager you need to retrieve your .lic file from Cisco. To retrieve the file you will need to input the MAC address of your Cisco Call Manager. This is how to find your MAC address using the Cisco Unified CM Administration page located at https://x.x.x.x:8443 For this I’m using system version 7.
Step 1: Go to the Navigation drop down in the upper right and select Cisco Unified OS Administration.
Step 2: Go to the show tab and select Network
Step 3: The 8th item down under Ethernet Details will be your MAC address.