After installing the licenses for Web to Host 6.3 and it showing up installed in the license management system there is still an error that appears when trying to run the Web to host session stating that all licenses are in use. Yet they're all available in the License Management System.

In this case the problem was that when installing the licenses the default location of the server machine name is always 127.0.0.1. However it does allow you to change this to your real local machine (server) name which you shouldn't. You should just add it after the 127.0.0.1.

This you can do in the license management system under options > advanced configuration.

If you install the licenses and you get a message (attached Remote Server.PNG) saying: You appear to be using a remote server. Authorization will only add licenses to THIS computer. Do you wish to continue?

It means the 127.0.0.1 has been tempered with and should be put back in.