Hello @Imtiyaz Faruqui
You have three options to migrate your RDS CALs:
Automatic connection method:
This recommended method communicates via internet directly to the Microsoft Clearinghouse outbound over TCP port 443.
Using a web browser:
This method allows migration when the server running the Remote Desktop Licensing Manager tool does not have internet connectivity, but the administrator has internet connectivity on a separate device. The URL for the Web migration method is displayed in the Manage RDS CALs Wizard.
Using a telephone:
This method allows the administrator to complete the migration process over the phone with a Microsoft representative. The appropriate telephone number is determined by the country/region that you chose in the Activate Server Wizard and is displayed in the Manage RDS CALs Wizard.
Here is specific steps to each migration method.
May I know are you going to deploy RD Licensing HA for RDS environment?
This thread explains more about Multiple RDS License Servers.
Best Regards
Karlie
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