You can reach out to licensing team for this, so that they can provide you the re-hosted license file for the co-resident ELM server.
Also find the below link helpful
https://supportforums.cisco.com/discussion/12703456/download-license-file-enterprise-license-manager-cucm-91
Regards
Abhay
Regards
Abhay Singh Reyal
The Only Way To Do Great Work Is To Love What You Do. If You Haven’t Found It Yet, Keep Looking. Don’t Settle