Olá amigo,
Você deve executar o processo de migração de servidor.
https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/migrate-rds-cals
https://social.technet.microsoft.com/Forums/office/en-US/d50705cb-cb16-4d63-88b5-63a77499b78a/migrate-2012-rds-license-server-role?forum=winserverTS
https://enterpriseit.co/windows-server/move-remote-desktop-licenses-new-server/
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