Due to the nature of the connection, the warning will always prompt because we are not using the remote computer name as the address.
To avoid this annoying prompt, when creating the RDP File on line 160 and 165 in src/MapUserControl.cs
Add this text to the RDP file;
authentication level:i:0
This parameter changes the "If server authentication fails" - "Warn me" default to "connect and don't warn me"

This will improve end user experience when using this feature of MeshCentral router.