Hello
During my recent testings with the demo and making it work with older clients, I discovered that clients from the 1.23 series support an EditServer tag.
Adding that tag to uo.cfg will override the LoginServer and will make the client connect to the specific server with encryption disabled and will make the menu appear.
The format of this tag:
EditServer=IP,PORT -> %d.%d.%d.%d,%d
This feature does not exist in the 1.25 series and above.