你好，
双向信任域/林支持 Per User 的跨域/林 RDS licensing.
下面有个英文的官方文档可以参考一下：
Best practices for setting up Remote Desktop Licensing (Terminal Server Licensing) across Active Directory Domains/Forests or Workgroup
https://support.microsoft.com/en-us/help/2473823/best-practices-for-setting-up-remote-desktop-licensing-terminal-server
Best Regards,
Amy
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