What is the appropriate solution to resolve the error message regarding Remote Desktop client access licenses?

The suitable solution to resolve the error message regarding Remote Desktop client access licenses is to disable the Remote Desktop licensing mode Group Policy setting on Host1.

When a Remote Desktop Session Host (RDSH) server is configured to use a specific licensing mode, it requires corresponding licenses to be available for users connecting to it. If the licensing mode is set incorrectly or if there are issues with the existing licenses, users may experience error messages related to client access licenses. Disabling the licensing mode Group Policy setting allows the RDSH server to revert to the default licensing configuration, which may help in bypassing the licensing issue and allow connections to be established without errors.

Choosing this option directly addresses the licensing issue, which is the root cause of the error message encountered. It is crucial in scenarios where the licensing mode is either not correctly set up or there are changes required for user access to functional properly.

Other choices either deal with management settings, diagnostics, or session behaviors that do not address the fundamental issue of the licensing mode, which is essential for user access.