How do you Guest another server?
Character select screen, bottom left click on world select and then hit guest
Guesting stops once you log off
The guest pass to the chosen server remains active for 24h.
Every time u choose a character to play (in the character selection screen) by default your home server is chosen. To choose the guest server, press World Selection button, and select your chosen guest server again.
Be very careful not to hit transfer instead. That’s an expensive error.