Hi,
If you are looking to get new license file for your new phone then follow this procedure:
1. Sign in to Enterprise License Manager (ELM). Most scenarios it is the IP Address of CUCM Publisher.
2. Go to Licenses -> License Fulfillment
3. Click on Other fulfillment option -> Generate License Request
4. Copy the content of file into Cisco Licensing Portal or you can open case with licensing@cisco.com
5. Once you get license file, install it on the ELM.
Please rate helpful posts and if applicable mark "Accept as a Solution".
Thanks, Vaijanath S.