Hello,
Thank you for posting in the Microsoft community forum.
This URL allows you to install and activate the RDS license server and install the RDS license through your Web browser.
In addition, you can contact the Microsoft Clearinghouse by telephone. The Microsoft Clearinghouse is the facility that Microsoft maintains to activate Remote Desktop license servers, issue RDS CALs to license servers, recover RDS CALs, and deactivate or reactivate license servers.
References:
Activate the Remote Desktop Services license server | Microsoft Learn
Install Remote Desktop Services Client Access Licenses by Using a Web Browser | Microsoft Learn
If you have any follow-up questions, please contact us.
Best regards
Jacen